US Core Implementation Guide
8.0.0-ballot - Ballot United States of America flag

US Core Implementation Guide, published by HL7 International / Cross-Group Projects. This guide is not an authorized publication; it is the continuous build for version 8.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/US-Core/ and changes regularly. See the Directory of published versions

Resource Profile: USCoreEncounterProfile - Detailed Descriptions

Page standards status: Trial-use Maturity Level: 3

Definitions for the us-core-encounter resource profile.

Guidance on how to interpret the contents of this table can be found here

0. Encounter
Must Supportfalse
2. Encounter.meta
Must Supporttrue
4. Encounter.meta.lastUpdated
ShortWhen the resource last changed
Must Supporttrue
icon Added: 6. Encounter.extension:interpreterRequired
Slice NameinterpreterRequired
Short𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗨𝗦𝗖𝗗𝗜: Whether the patient needs an interpreter
Control0..1
TypeExtension(US Core Interpreter Required Extension) (Extension Type: Coding)
Must Supportfalse
8. Encounter.identifier
NoteThis is a business identifier, not a resource identifier (see discussion)
Must Supporttrue
10. Encounter.identifier.system
Control1..1
Typeuri
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
12. Encounter.identifier.value
Control1..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
14. Encounter.status
Must Supporttrue
16. Encounter.class
Must Supporttrue
18. Encounter.type
Control1..?
BindingUnless not suitable, these codes SHALL be taken from icon Changed:Encounter Type .
(extensible to http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1267.23)

Valueset to describe the Encounter Type

Must Supporttrue
20. Encounter.subject
Control1..?
TypeReference(US Core Patient Profile, Group)
Must Supporttrue
Must Support TypesReference(US Core Patient Profile)
22. Encounter.participant
Must Supporttrue
24. Encounter.participant.type
Must Supporttrue
26. Encounter.participant.period
Must Supporttrue
28. Encounter.participant.individual
TypeReference(US Core Practitioner Profile, US Core PractitionerRole Profile, US Core RelatedPerson Profile)
Must Supporttrue
Must Support TypesReference(US Core Practitioner Profile)
30. Encounter.period
Must Supporttrue
32. Encounter.reasonCode
Must Supporttrue
34. Encounter.reasonReference
Control0..*
TypeReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile, US Core Procedure Profile, Observation, ImmunizationRecommendation)
Must Supporttrue
Must Support TypesReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile)
36. Encounter.hospitalization
Must Supporttrue
38. Encounter.hospitalization.dischargeDisposition
BindingThe codes SHOULD be taken from icon Changed:https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.html
(preferred to https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.html)

National Uniform Billing Committee, manual UB-04, UB form locator 17

Must Supporttrue
40. Encounter.location
Must Supporttrue
42. Encounter.location.location
TypeReference(US Core Location Profile)
Must Supporttrue
44. Encounter.serviceProvider
TypeReference(US Core Organization Profile)
Must Supporttrue

Guidance on how to interpret the contents of this table can be found here

0. Encounter
Definition

An interaction between a patient and healthcare provider(s) for the purpose of providing healthcare service(s) or assessing the health status of a patient.

ShortAn interaction during which services are provided to the patient
Control0..*
Is Modifierfalse
Must Supportfalse
Summaryfalse
Alternate NamesVisit
Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
dom-6: A resource should have narrative for robust management (text.`div`.exists())
2. Encounter.meta
Definition

The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

ShortMetadata about the resource
Control0..1
TypeMeta
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
4. Encounter.meta.lastUpdated
Definition

When the resource last changed - e.g. when the version changed.

ShortWhen the resource last changedWhen the resource version last changed
Comments

This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant. This is equivalent to the HTTP Last-Modified and SHOULD have the same value on a read interaction.

Control0..1
Typeinstant
Is Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
6. Encounter.implicitRules
Definition

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

ShortA set of rules under which this content was created
Comments

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

Control0..1
Typeuri
Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
8. Encounter.extension:interpreterRequired
Slice NameinterpreterRequired
Definition

This individual needs an interpreter to communicate healthcare information.

Short𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗨𝗦𝗖𝗗𝗜: Whether the patient needs an interpreter
Comments

The individual does not speak the default language of the organization, and hence requires an interpreter.

Control0..1
This element is affected by the following invariants: ele-1
TypeExtension(US Core Interpreter Required Extension) (Extension Type: Coding)
Is Modifierfalse
Must Supportfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
10. Encounter.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

ShortExtensions that cannot be ignored
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Summaryfalse
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
12. Encounter.identifier
Definition

Identifier(s) by which this encounter is known.

ShortIdentifier(s) by which this encounter is known
NoteThis is a business identifier, not a resource identifier (see discussion)
Control0..*
TypeIdentifier
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
14. Encounter.identifier.use
Definition

The purpose of this identifier.

Shortusual | official | temp | secondary | old (If known)
Comments

Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.

Control0..1
BindingThe codes SHALL be taken from IdentifierUsehttp://hl7.org/fhir/ValueSet/identifier-use|4.0.1
(required to http://hl7.org/fhir/ValueSet/identifier-use|4.0.1)

Identifies the purpose for this identifier, if known .

Typecode
Is Modifiertrue because This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one.
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.

Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. Encounter.identifier.system
Definition

Establishes the namespace for the value - that is, a URL that describes a set values that are unique.

ShortThe namespace for the identifier value
Comments

Identifier.system is always case sensitive.

Control10..1
Typeuri
Is Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
Requirements

There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.

Example<br/><b>General</b>:http://www.acme.com/identifiers/patient
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
18. Encounter.identifier.value
Definition

The portion of the identifier typically relevant to the user and which is unique within the context of the system.

ShortThe value that is unique
Comments

If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.

Control10..1
Typestring
Is Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
Example<br/><b>General</b>:123456
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
20. Encounter.status
Definition

planned | arrived | triaged | in-progress | onleave | finished | cancelled +.

Shortplanned | arrived | triaged | in-progress | onleave | finished | cancelled +
Comments

Note that internal business rules will determine the appropriate transitions that may occur between statuses (and also classes).

Control1..1
BindingThe codes SHALL be taken from EncounterStatushttp://hl7.org/fhir/ValueSet/encounter-status|4.0.1
(required to http://hl7.org/fhir/ValueSet/encounter-status|4.0.1)

Current state of the encounter.

Typecode
Is Modifiertrue because This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
22. Encounter.class
Definition

Concepts representing classification of patient encounter such as ambulatory (outpatient), inpatient, emergency, home health or others due to local variations.

ShortClassification of patient encounter
Control1..1
BindingUnless not suitable, these codes SHALL be taken from ActEncounterCodehttp://terminology.hl7.org/ValueSet/v3-ActEncounterCode
(extensible to http://terminology.hl7.org/ValueSet/v3-ActEncounterCode)

Classification of the encounter.

TypeCoding
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
24. Encounter.type
Definition

Specific type of encounter (e.g. e-mail consultation, surgical day-care, skilled nursing, rehabilitation).

ShortSpecific type of encounter
Comments

Since there are many ways to further classify encounters, this element is 0..*.

Control10..*
BindingUnless not suitable, these codes SHALL be taken from For example codes, see Encounter Type .http://hl7.org/fhir/ValueSet/encounter-type
(extensible to http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1267.23)

Valueset to describe the Encounter Type


The type of encounter.

TypeCodeableConcept
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
26. Encounter.subject
Definition

The patient or group present at the encounter.

ShortThe patient or group present at the encounter
Comments

While the encounter is always about the patient, the patient might not actually be known in all contexts of use, and there may be a group of patients that could be anonymous (such as in a group therapy for Alcoholics Anonymous - where the recording of the encounter could be used for billing on the number of people/staff and not important to the context of the specific patients) or alternately in veterinary care a herd of sheep receiving treatment (where the animals are not individually tracked).

Control10..1
TypeReference(US Core Patient Profile, Group, Patient)
Is Modifierfalse
Must Supporttrue
Must Support TypesReference(US Core Patient Profile)
Summarytrue
Alternate Namespatient
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. Encounter.participant
Definition

The list of people responsible for providing the service.

ShortList of participants involved in the encounter
Control0..*
TypeBackboneElement
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
30. Encounter.participant.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

ShortExtensions that cannot be ignored even if unrecognized
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
32. Encounter.participant.type
Definition

Role of participant in encounter.

ShortRole of participant in encounter
Comments

The participant type indicates how an individual participates in an encounter. It includes non-practitioner participants, and for practitioners this is to describe the action type in the context of this encounter (e.g. Admitting Dr, Attending Dr, Translator, Consulting Dr). This is different to the practitioner roles which are functional roles, derived from terms of employment, education, licensing, etc.

Control0..*
BindingUnless not suitable, these codes SHALL be taken from ParticipantTypehttp://hl7.org/fhir/ValueSet/encounter-participant-type
(extensible to http://hl7.org/fhir/ValueSet/encounter-participant-type)

Role of participant in encounter.

TypeCodeableConcept
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
34. Encounter.participant.period
Definition

The period of time that the specified participant participated in the encounter. These can overlap or be sub-sets of the overall encounter's period.

ShortPeriod of time during the encounter that the participant participated
Control0..1
TypePeriod
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
36. Encounter.participant.individual
Definition

Persons involved in the encounter other than the patient.

ShortPersons involved in the encounter other than the patient
Control0..1
TypeReference(US Core Practitioner Profile, US Core PractitionerRole Profile, US Core RelatedPerson Profile, Practitioner, PractitionerRole, RelatedPerson)
Is Modifierfalse
Must Supporttrue
Must Support TypesReference(US Core Practitioner Profile)
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
38. Encounter.period
Definition

The start and end time of the encounter.

ShortThe start and end time of the encounter
Comments

If not (yet) known, the end of the Period may be omitted.

Control0..1
TypePeriod
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
40. Encounter.reasonCode
Definition

Reason the encounter takes place, expressed as a code. For admissions, this can be used for a coded admission diagnosis.

ShortCoded reason the encounter takes place
Comments

For systems that need to know which was the primary diagnosis, these will be marked with the standard extension primaryDiagnosis (which is a sequence value rather than a flag, 1 = primary diagnosis).

Control0..*
BindingThe codes SHOULD be taken from EncounterReasonCodeshttp://hl7.org/fhir/ValueSet/encounter-reason
(preferred to http://hl7.org/fhir/ValueSet/encounter-reason)

Reason why the encounter takes place.

TypeCodeableConcept
Is Modifierfalse
Must Supporttrue
Summarytrue
Alternate NamesIndication, Admission diagnosis
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
42. Encounter.reasonReference
Definition

Reason the encounter takes place, expressed as a code. For admissions, this can be used for a coded admission diagnosis.

ShortReason the encounter takes place (reference)
Comments

For systems that need to know which was the primary diagnosis, these will be marked with the standard extension primaryDiagnosis (which is a sequence value rather than a flag, 1 = primary diagnosis).

Control0..*
TypeReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile, US Core Procedure Profile, Observation, ImmunizationRecommendation, Condition, Procedure)
Is Modifierfalse
Must Supporttrue
Must Support TypesReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile)
Summarytrue
Alternate NamesIndication, Admission diagnosis
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
44. Encounter.hospitalization
Definition

Details about the admission to a healthcare service.

ShortDetails about the admission to a healthcare service
Comments

An Encounter may cover more than just the inpatient stay. Contexts such as outpatients, community clinics, and aged care facilities are also included.

The duration recorded in the period of this encounter covers the entire scope of this hospitalization record.

Control0..1
TypeBackboneElement
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
46. Encounter.hospitalization.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

ShortExtensions that cannot be ignored even if unrecognized
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
48. Encounter.hospitalization.dischargeDisposition
Definition

Category or kind of location after discharge.

ShortCategory or kind of location after discharge
Control0..1
BindingThe codes SHOULD be taken from For example codes, see https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.htmlhttp://hl7.org/fhir/ValueSet/encounter-discharge-disposition
(preferred to https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.html)

National Uniform Billing Committee, manual UB-04, UB form locator 17


Discharge Disposition.

TypeCodeableConcept
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
50. Encounter.location
Definition

List of locations where the patient has been during this encounter.

ShortList of locations where the patient has been
Comments

Virtual encounters can be recorded in the Encounter by specifying a location reference to a location of type "kind" such as "client's home" and an encounter.class = "virtual".

Control0..*
TypeBackboneElement
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
52. Encounter.location.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

ShortExtensions that cannot be ignored even if unrecognized
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
54. Encounter.location.location
Definition

The location where the encounter takes place.

ShortLocation the encounter takes place
Control1..1
TypeReference(US Core Location Profile, Location)
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
56. Encounter.serviceProvider
Definition

The organization that is primarily responsible for this Encounter's services. This MAY be the same as the organization on the Patient record, however it could be different, such as if the actor performing the services was from an external organization (which may be billed seperately) for an external consultation. Refer to the example bundle showing an abbreviated set of Encounters for a colonoscopy.

ShortThe organization (facility) responsible for this encounter
Control0..1
TypeReference(US Core Organization Profile, Organization)
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

Guidance on how to interpret the contents of this table can be found here

0. Encounter
Definition

An interaction between a patient and healthcare provider(s) for the purpose of providing healthcare service(s) or assessing the health status of a patient.

ShortAn interaction during which services are provided to the patient
Control0..*
Is Modifierfalse
Must Supportfalse
Summaryfalse
Alternate NamesVisit
Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
dom-6: A resource should have narrative for robust management (text.`div`.exists())
2. Encounter.id
Definition

The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.

ShortLogical id of this artifact
Comments

The only time that a resource does not have an id is when it is being submitted to the server using a create operation.

Control0..1
Typeid
Is Modifierfalse
Summarytrue
4. Encounter.meta
Definition

The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

ShortMetadata about the resource
Control0..1
TypeMeta
Is Modifierfalse
Must Supporttrue
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
6. Encounter.meta.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
8. Encounter.meta.extension
Definition

May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

ShortAdditional content defined by implementations
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Encounter.meta.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • 10. Encounter.meta.versionId
    Definition

    The version specific identifier, as it appears in the version portion of the URL. This value changes when the resource is created, updated, or deleted.

    ShortVersion specific identifier
    Comments

    The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.

    Control0..1
    Typeid
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    12. Encounter.meta.lastUpdated
    Definition

    When the resource last changed - e.g. when the version changed.

    ShortWhen the resource last changed
    Comments

    This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant. This is equivalent to the HTTP Last-Modified and SHOULD have the same value on a read interaction.

    Control0..1
    Typeinstant
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Must Supporttrue
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    14. Encounter.meta.source
    Definition

    icon Changed:

    A uri that identifies the source system of the resource. This provides a minimal amount of Provenance information that can be used to track or differentiate the source of information in the resource. The source may identify another FHIR server, document, message, database, etc.

    ShortIdentifies where the resource comes from
    Comments

    In the provenance resource, this corresponds to Provenance.entity.what[x]. The exact use of the source (and the implied Provenance.entity.role) is left to implementer discretion. Only one nominated source is allowed; for additional provenance details, a full Provenance resource should be used.

    This element can be used to indicate where the current master source of a resource that has a canonical URL if the resource is no longer hosted at the canonical URL.

    Control0..1
    Typeuri
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    16. Encounter.meta.profile
    Definition

    icon Changed:

    A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.

    ShortProfiles this resource claims to conform to
    Comments

    It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.

    Control0..*
    Typecanonical(StructureDefinition)
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    18. Encounter.meta.security
    Definition

    Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.

    ShortSecurity Labels applied to this resource
    Comments

    The security labels can be updated without changing the stated version of the resource. The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.

    Control0..*
    BindingUnless not suitable, these codes SHALL be taken from All Security Labels
    (extensible to http://hl7.org/fhir/ValueSet/security-labels)

    Security Labels from the Healthcare Privacy and Security Classification System.

    TypeCoding
    Is Modifierfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    20. Encounter.meta.tag
    Definition

    Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.

    ShortTags applied to this resource
    Comments

    The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.

    Control0..*
    BindingFor example codes, see CommonTags
    (example to http://hl7.org/fhir/ValueSet/common-tags)

    Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".

    TypeCoding
    Is Modifierfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    22. Encounter.implicitRules
    Definition

    A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

    ShortA set of rules under which this content was created
    Comments

    Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

    Control0..1
    Typeuri
    Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    24. Encounter.language
    Definition

    The base language in which the resource is written.

    ShortLanguage of the resource content
    Comments

    Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

    Control0..1
    BindingThe codes SHOULD be taken from CommonLanguages
    (preferred to http://hl7.org/fhir/ValueSet/languages)

    A human language.

    Additional BindingsPurpose
    AllLanguagesMax Binding
    Typecode
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    26. Encounter.text
    Definition

    A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.

    ShortText summary of the resource, for human interpretation
    Comments

    Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.

    Control0..1
    TypeNarrative
    Is Modifierfalse
    Summaryfalse
    Alternate Namesnarrative, html, xhtml, display
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    28. Encounter.contained
    Definition

    These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.

    ShortContained, inline Resources
    Comments

    This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.

    Control0..*
    TypeResource
    Is Modifierfalse
    Summaryfalse
    Alternate Namesinline resources, anonymous resources, contained resources
    30. Encounter.extension
    Definition

    icon Changed:

    An Extension

    Shorticon Changed:Extension
    Control0..*
    TypeExtension
    Is Modifierfalse
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    SlicingThis element introduces a set of slices on Encounter.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 32. Encounter.extension:interpreterRequired
      Slice NameinterpreterRequired
      Definition

      This individual needs an interpreter to communicate healthcare information.

      Short𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗨𝗦𝗖𝗗𝗜: Whether the patient needs an interpreter
      Comments

      The individual does not speak the default language of the organization, and hence requires an interpreter.

      Control0..1
      This element is affected by the following invariants: ele-1
      TypeExtension(US Core Interpreter Required Extension) (Extension Type: Coding)
      Is Modifierfalse
      Must Supportfalse
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      34. Encounter.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
      Summaryfalse
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      36. Encounter.identifier
      Definition

      Identifier(s) by which this encounter is known.

      ShortIdentifier(s) by which this encounter is known
      NoteThis is a business identifier, not a resource identifier (see discussion)
      Control0..*
      TypeIdentifier
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      38. Encounter.identifier.id
      Definition

      Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

      ShortUnique id for inter-element referencing
      Control0..1
      Typestring
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      40. Encounter.identifier.extension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

      ShortAdditional content defined by implementations
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      SlicingThis element introduces a set of slices on Encounter.identifier.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ url
      • 42. Encounter.identifier.use
        Definition

        The purpose of this identifier.

        Shortusual | official | temp | secondary | old (If known)
        Comments

        Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.

        Control0..1
        BindingThe codes SHALL be taken from IdentifierUse
        (required to http://hl7.org/fhir/ValueSet/identifier-use|4.0.1)

        Identifies the purpose for this identifier, if known .

        Typecode
        Is Modifiertrue because This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one.
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        44. Encounter.identifier.type
        Definition

        A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.

        ShortDescription of identifier
        Comments

        This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.

        Control0..1
        BindingUnless not suitable, these codes SHALL be taken from Identifier Type Codes
        (extensible to http://hl7.org/fhir/ValueSet/identifier-type)

        A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.

        TypeCodeableConcept
        Is Modifierfalse
        Summarytrue
        Requirements

        Allows users to make use of identifiers when the identifier system is not known.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        46. Encounter.identifier.system
        Definition

        Establishes the namespace for the value - that is, a URL that describes a set values that are unique.

        ShortThe namespace for the identifier value
        Comments

        Identifier.system is always case sensitive.

        Control1..1
        Typeuri
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supporttrue
        Summarytrue
        Requirements

        There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.

        Example<br/><b>General</b>:http://www.acme.com/identifiers/patient
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        48. Encounter.identifier.value
        Definition

        The portion of the identifier typically relevant to the user and which is unique within the context of the system.

        ShortThe value that is unique
        Comments

        If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.

        Control1..1
        Typestring
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supporttrue
        Summarytrue
        Example<br/><b>General</b>:123456
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        50. Encounter.identifier.period
        Definition

        Time period during which identifier is/was valid for use.

        ShortTime period when id is/was valid for use
        Control0..1
        TypePeriod
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        52. Encounter.identifier.assigner
        Definition

        Organization that issued/manages the identifier.

        ShortOrganization that issued id (may be just text)
        Comments

        The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.

        Control0..1
        TypeReference(Organization)
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        54. Encounter.status
        Definition

        planned | arrived | triaged | in-progress | onleave | finished | cancelled +.

        Shortplanned | arrived | triaged | in-progress | onleave | finished | cancelled +
        Comments

        Note that internal business rules will determine the appropriate transitions that may occur between statuses (and also classes).

        Control1..1
        BindingThe codes SHALL be taken from EncounterStatus
        (required to http://hl7.org/fhir/ValueSet/encounter-status|4.0.1)

        Current state of the encounter.

        Typecode
        Is Modifiertrue because This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        56. Encounter.statusHistory
        Definition

        The status history permits the encounter resource to contain the status history without needing to read through the historical versions of the resource, or even have the server store them.

        ShortList of past encounter statuses
        Comments

        The current status is always found in the current version of the resource, not the status history.

        Control0..*
        TypeBackboneElement
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        58. Encounter.statusHistory.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        60. Encounter.statusHistory.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        62. Encounter.statusHistory.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        64. Encounter.statusHistory.status
        Definition

        planned | arrived | triaged | in-progress | onleave | finished | cancelled +.

        Shortplanned | arrived | triaged | in-progress | onleave | finished | cancelled +
        Control1..1
        BindingThe codes SHALL be taken from EncounterStatus
        (required to http://hl7.org/fhir/ValueSet/encounter-status|4.0.1)

        Current state of the encounter.

        Typecode
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        66. Encounter.statusHistory.period
        Definition

        The time that the episode was in the specified status.

        ShortThe time that the episode was in the specified status
        Control1..1
        TypePeriod
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        68. Encounter.class
        Definition

        Concepts representing classification of patient encounter such as ambulatory (outpatient), inpatient, emergency, home health or others due to local variations.

        ShortClassification of patient encounter
        Control1..1
        BindingUnless not suitable, these codes SHALL be taken from ActEncounterCode
        (extensible to http://terminology.hl7.org/ValueSet/v3-ActEncounterCode)

        Classification of the encounter.

        TypeCoding
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        70. Encounter.classHistory
        Definition

        The class history permits the tracking of the encounters transitions without needing to go through the resource history. This would be used for a case where an admission starts of as an emergency encounter, then transitions into an inpatient scenario. Doing this and not restarting a new encounter ensures that any lab/diagnostic results can more easily follow the patient and not require re-processing and not get lost or cancelled during a kind of discharge from emergency to inpatient.

        ShortList of past encounter classes
        Control0..*
        TypeBackboneElement
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        72. Encounter.classHistory.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        74. Encounter.classHistory.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        76. Encounter.classHistory.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        78. Encounter.classHistory.class
        Definition

        inpatient | outpatient | ambulatory | emergency +.

        Shortinpatient | outpatient | ambulatory | emergency +
        Control1..1
        BindingUnless not suitable, these codes SHALL be taken from ActEncounterCode
        (extensible to http://terminology.hl7.org/ValueSet/v3-ActEncounterCode)

        Classification of the encounter.

        TypeCoding
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        80. Encounter.classHistory.period
        Definition

        The time that the episode was in the specified class.

        ShortThe time that the episode was in the specified class
        Control1..1
        TypePeriod
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        82. Encounter.type
        Definition

        Specific type of encounter (e.g. e-mail consultation, surgical day-care, skilled nursing, rehabilitation).

        ShortSpecific type of encounter
        Comments

        Since there are many ways to further classify encounters, this element is 0..*.

        Control1..*
        BindingUnless not suitable, these codes SHALL be taken from Encounter Type .
        (extensible to http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1267.23)

        Valueset to describe the Encounter Type

        TypeCodeableConcept
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        84. Encounter.serviceType
        Definition

        Broad categorization of the service that is to be provided (e.g. cardiology).

        ShortSpecific type of service
        Control0..1
        BindingFor example codes, see ServiceType
        (example to http://hl7.org/fhir/ValueSet/service-type)

        Broad categorization of the service that is to be provided.

        TypeCodeableConcept
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        86. Encounter.priority
        Definition

        Indicates the urgency of the encounter.

        ShortIndicates the urgency of the encounter
        Control0..1
        BindingFor example codes, see ActPriority
        (example to http://terminology.hl7.org/ValueSet/v3-ActPriority)

        Indicates the urgency of the encounter.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        88. Encounter.subject
        Definition

        The patient or group present at the encounter.

        ShortThe patient or group present at the encounter
        Comments

        While the encounter is always about the patient, the patient might not actually be known in all contexts of use, and there may be a group of patients that could be anonymous (such as in a group therapy for Alcoholics Anonymous - where the recording of the encounter could be used for billing on the number of people/staff and not important to the context of the specific patients) or alternately in veterinary care a herd of sheep receiving treatment (where the animals are not individually tracked).

        Control1..1
        TypeReference(US Core Patient Profile, Group)
        Is Modifierfalse
        Must Supporttrue
        Must Support TypesReference(US Core Patient Profile)
        Summarytrue
        Alternate Namespatient
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        90. Encounter.episodeOfCare
        Definition

        Where a specific encounter should be classified as a part of a specific episode(s) of care this field should be used. This association can facilitate grouping of related encounters together for a specific purpose, such as government reporting, issue tracking, association via a common problem. The association is recorded on the encounter as these are typically created after the episode of care and grouped on entry rather than editing the episode of care to append another encounter to it (the episode of care could span years).

        ShortEpisode(s) of care that this encounter should be recorded against
        Control0..*
        TypeReference(EpisodeOfCare)
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        92. Encounter.basedOn
        Definition

        The request this encounter satisfies (e.g. incoming referral or procedure request).

        ShortThe ServiceRequest that initiated this encounter
        Control0..*
        TypeReference(ServiceRequest)
        Is Modifierfalse
        Summaryfalse
        Alternate NamesincomingReferral
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        94. Encounter.participant
        Definition

        The list of people responsible for providing the service.

        ShortList of participants involved in the encounter
        Control0..*
        TypeBackboneElement
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        96. Encounter.participant.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        98. Encounter.participant.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        100. Encounter.participant.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        102. Encounter.participant.type
        Definition

        Role of participant in encounter.

        ShortRole of participant in encounter
        Comments

        The participant type indicates how an individual participates in an encounter. It includes non-practitioner participants, and for practitioners this is to describe the action type in the context of this encounter (e.g. Admitting Dr, Attending Dr, Translator, Consulting Dr). This is different to the practitioner roles which are functional roles, derived from terms of employment, education, licensing, etc.

        Control0..*
        BindingUnless not suitable, these codes SHALL be taken from ParticipantType
        (extensible to http://hl7.org/fhir/ValueSet/encounter-participant-type)

        Role of participant in encounter.

        TypeCodeableConcept
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        104. Encounter.participant.period
        Definition

        The period of time that the specified participant participated in the encounter. These can overlap or be sub-sets of the overall encounter's period.

        ShortPeriod of time during the encounter that the participant participated
        Control0..1
        TypePeriod
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        106. Encounter.participant.individual
        Definition

        Persons involved in the encounter other than the patient.

        ShortPersons involved in the encounter other than the patient
        Control0..1
        TypeReference(US Core Practitioner Profile, US Core PractitionerRole Profile, US Core RelatedPerson Profile)
        Is Modifierfalse
        Must Supporttrue
        Must Support TypesReference(US Core Practitioner Profile)
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        108. Encounter.appointment
        Definition

        The appointment that scheduled this encounter.

        ShortThe appointment that scheduled this encounter
        Control0..*
        TypeReference(Appointment)
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        110. Encounter.period
        Definition

        The start and end time of the encounter.

        ShortThe start and end time of the encounter
        Comments

        If not (yet) known, the end of the Period may be omitted.

        Control0..1
        TypePeriod
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        112. Encounter.length
        Definition

        Quantity of time the encounter lasted. This excludes the time during leaves of absence.

        ShortQuantity of time the encounter lasted (less time absent)
        Comments

        May differ from the time the Encounter.period lasted because of leave of absence.

        Control0..1
        TypeDuration
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        114. Encounter.reasonCode
        Definition

        Reason the encounter takes place, expressed as a code. For admissions, this can be used for a coded admission diagnosis.

        ShortCoded reason the encounter takes place
        Comments

        For systems that need to know which was the primary diagnosis, these will be marked with the standard extension primaryDiagnosis (which is a sequence value rather than a flag, 1 = primary diagnosis).

        Control0..*
        BindingThe codes SHOULD be taken from EncounterReasonCodes
        (preferred to http://hl7.org/fhir/ValueSet/encounter-reason)

        Reason why the encounter takes place.

        TypeCodeableConcept
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Alternate NamesIndication, Admission diagnosis
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        116. Encounter.reasonReference
        Definition

        Reason the encounter takes place, expressed as a code. For admissions, this can be used for a coded admission diagnosis.

        ShortReason the encounter takes place (reference)
        Comments

        For systems that need to know which was the primary diagnosis, these will be marked with the standard extension primaryDiagnosis (which is a sequence value rather than a flag, 1 = primary diagnosis).

        Control0..*
        TypeReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile, US Core Procedure Profile, Observation, ImmunizationRecommendation)
        Is Modifierfalse
        Must Supporttrue
        Must Support TypesReference(US Core Condition Problems and Health Concerns Profile, US Core Condition Encounter Diagnosis Profile)
        Summarytrue
        Alternate NamesIndication, Admission diagnosis
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        118. Encounter.diagnosis
        Definition

        The list of diagnosis relevant to this encounter.

        ShortThe list of diagnosis relevant to this encounter
        Control0..*
        TypeBackboneElement
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        120. Encounter.diagnosis.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        122. Encounter.diagnosis.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        124. Encounter.diagnosis.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        126. Encounter.diagnosis.condition
        Definition

        Reason the encounter takes place, as specified using information from another resource. For admissions, this is the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.

        ShortThe diagnosis or procedure relevant to the encounter
        Comments

        For systems that need to know which was the primary diagnosis, these will be marked with the standard extension primaryDiagnosis (which is a sequence value rather than a flag, 1 = primary diagnosis).

        Control1..1
        TypeReference(Condition, Procedure)
        Is Modifierfalse
        Summarytrue
        Alternate NamesAdmission diagnosis, discharge diagnosis, indication
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        128. Encounter.diagnosis.use
        Definition

        Role that this diagnosis has within the encounter (e.g. admission, billing, discharge …).

        ShortRole that this diagnosis has within the encounter (e.g. admission, billing, discharge …)
        Control0..1
        BindingThe codes SHOULD be taken from DiagnosisRole
        (preferred to http://hl7.org/fhir/ValueSet/diagnosis-role)

        The type of diagnosis this condition represents.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        130. Encounter.diagnosis.rank
        Definition

        Ranking of the diagnosis (for each role type).

        ShortRanking of the diagnosis (for each role type)
        Control0..1
        TypepositiveInt
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        132. Encounter.account
        Definition

        The set of accounts that may be used for billing for this Encounter.

        ShortThe set of accounts that may be used for billing for this Encounter
        Comments

        The billing system may choose to allocate billable items associated with the Encounter to different referenced Accounts based on internal business rules.

        Control0..*
        TypeReference(Account)
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        134. Encounter.hospitalization
        Definition

        Details about the admission to a healthcare service.

        ShortDetails about the admission to a healthcare service
        Comments

        An Encounter may cover more than just the inpatient stay. Contexts such as outpatients, community clinics, and aged care facilities are also included.

        The duration recorded in the period of this encounter covers the entire scope of this hospitalization record.

        Control0..1
        TypeBackboneElement
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        136. Encounter.hospitalization.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        138. Encounter.hospitalization.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        140. Encounter.hospitalization.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        142. Encounter.hospitalization.preAdmissionIdentifier
        Definition

        Pre-admission identifier.

        ShortPre-admission identifier
        Control0..1
        TypeIdentifier
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        144. Encounter.hospitalization.origin
        Definition

        The location/organization from which the patient came before admission.

        ShortThe location/organization from which the patient came before admission
        Control0..1
        TypeReference(Location, Organization)
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        146. Encounter.hospitalization.admitSource
        Definition

        From where patient was admitted (physician referral, transfer).

        ShortFrom where patient was admitted (physician referral, transfer)
        Control0..1
        BindingThe codes SHOULD be taken from AdmitSource
        (preferred to http://hl7.org/fhir/ValueSet/encounter-admit-source)

        From where the patient was admitted.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        148. Encounter.hospitalization.reAdmission
        Definition

        Whether this hospitalization is a readmission and why if known.

        ShortThe type of hospital re-admission that has occurred (if any). If the value is absent, then this is not identified as a readmission
        Control0..1
        BindingFor example codes, see hl7VS-re-admissionIndicator
        (example to http://terminology.hl7.org/ValueSet/v2-0092)

        The reason for re-admission of this hospitalization encounter.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        150. Encounter.hospitalization.dietPreference
        Definition

        Diet preferences reported by the patient.

        ShortDiet preferences reported by the patient
        Comments

        For example, a patient may request both a dairy-free and nut-free diet preference (not mutually exclusive).

        Control0..*
        BindingFor example codes, see Diet
        (example to http://hl7.org/fhir/ValueSet/encounter-diet)

        Medical, cultural or ethical food preferences to help with catering requirements.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Requirements

        Used to track patient's diet restrictions and/or preference. For a complete description of the nutrition needs of a patient during their stay, one should use the nutritionOrder resource which links to Encounter.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        152. Encounter.hospitalization.specialCourtesy
        Definition

        Special courtesies (VIP, board member).

        ShortSpecial courtesies (VIP, board member)
        Control0..*
        BindingThe codes SHOULD be taken from SpecialCourtesy
        (preferred to http://hl7.org/fhir/ValueSet/encounter-special-courtesy)

        Special courtesies.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        154. Encounter.hospitalization.specialArrangement
        Definition

        Any special requests that have been made for this hospitalization encounter, such as the provision of specific equipment or other things.

        ShortWheelchair, translator, stretcher, etc.
        Control0..*
        BindingThe codes SHOULD be taken from SpecialArrangements
        (preferred to http://hl7.org/fhir/ValueSet/encounter-special-arrangements)

        Special arrangements.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        156. Encounter.hospitalization.destination
        Definition

        Location/organization to which the patient is discharged.

        ShortLocation/organization to which the patient is discharged
        Control0..1
        TypeReference(Location, Organization)
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        158. Encounter.hospitalization.dischargeDisposition
        Definition

        Category or kind of location after discharge.

        ShortCategory or kind of location after discharge
        Control0..1
        BindingThe codes SHOULD be taken from https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.html
        (preferred to https://terminology.hl7.org/6.0.2/ValueSet-v3-USEncounterDischargeDisposition.html)

        National Uniform Billing Committee, manual UB-04, UB form locator 17

        TypeCodeableConcept
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        160. Encounter.location
        Definition

        List of locations where the patient has been during this encounter.

        ShortList of locations where the patient has been
        Comments

        Virtual encounters can be recorded in the Encounter by specifying a location reference to a location of type "kind" such as "client's home" and an encounter.class = "virtual".

        Control0..*
        TypeBackboneElement
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        162. Encounter.location.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        164. Encounter.location.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        166. Encounter.location.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        168. Encounter.location.location
        Definition

        The location where the encounter takes place.

        ShortLocation the encounter takes place
        Control1..1
        TypeReference(US Core Location Profile)
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        170. Encounter.location.status
        Definition

        The status of the participants' presence at the specified location during the period specified. If the participant is no longer at the location, then the period will have an end date/time.

        Shortplanned | active | reserved | completed
        Comments

        When the patient is no longer active at a location, then the period end date is entered, and the status may be changed to completed.

        Control0..1
        BindingThe codes SHALL be taken from EncounterLocationStatus
        (required to http://hl7.org/fhir/ValueSet/encounter-location-status|4.0.1)

        The status of the location.

        Typecode
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        172. Encounter.location.physicalType
        Definition

        This will be used to specify the required levels (bed/ward/room/etc.) desired to be recorded to simplify either messaging or query.

        ShortThe physical type of the location (usually the level in the location hierachy - bed room ward etc.)
        Comments

        This information is de-normalized from the Location resource to support the easier understanding of the encounter resource and processing in messaging or query.

        There may be many levels in the hierachy, and this may only pic specific levels that are required for a specific usage scenario.

        Control0..1
        BindingFor example codes, see LocationType
        (example to http://hl7.org/fhir/ValueSet/location-physical-type)

        Physical form of the location.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        174. Encounter.location.period
        Definition

        Time period during which the patient was present at the location.

        ShortTime period during which the patient was present at the location
        Control0..1
        TypePeriod
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        176. Encounter.serviceProvider
        Definition

        The organization that is primarily responsible for this Encounter's services. This MAY be the same as the organization on the Patient record, however it could be different, such as if the actor performing the services was from an external organization (which may be billed seperately) for an external consultation. Refer to the example bundle showing an abbreviated set of Encounters for a colonoscopy.

        ShortThe organization (facility) responsible for this encounter
        Control0..1
        TypeReference(US Core Organization Profile)
        Is Modifierfalse
        Must Supporttrue
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        178. Encounter.partOf
        Definition

        Another Encounter of which this encounter is a part of (administratively or in time).

        ShortAnother Encounter this encounter is part of
        Comments

        This is also used for associating a child's encounter back to the mother's encounter.

        Refer to the Notes section in the Patient resource for further details.

        Control0..1
        TypeReference(Encounter)
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))