QI-Core Implementation Guide
7.0.2 - STU 7

QI-Core Implementation Guide, published by HL7 International / Clinical Quality Information. This guide is not an authorized publication; it is the continuous build for version 7.0.2 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-qi-core/ and changes regularly. See the Directory of published versions

## Resource Profile: QICore Simple Observation

Official URL: http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-simple-observation | Version: 7.0.2
Standards status: Trial-use | Maturity Level: 4 | Computable Name: QICoreSimpleObservation

Profile of Simple Observation for decision support/quality metrics. Defines the core set of elements and extensions for quality rule and measure authors.

"Must Have", "QI Elements" and "primary code path" are defined in the QI-Core Must Support section.
Must Have:

- subject: (QI) Who and/or what the observation is about
- category: (QI) Classification of type of observation
- code: (QI) Type of observation (code / type)
- status: (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown

QI Elements:

- performer: (QI) Who is responsible for the observation
- derivedFrom: (QI) US Core Profiles or other resource the observation is made from
- value[x]: (QI) Actual result
- effective[x]: (QI) Clinically relevant time/time-period for observation
- interpretation: (QI) High, low, normal, etc.

Primary code path: code
(PCPath) This element is the primary code path for this resource CQL Retrieve
Usage

Note: US-Core and QI-Core define precise profiles for specific observations, as well as a general profile for LOINC-code laboratory result observations. QI-Core inherits these US Core specific profiles directly and individually profiles others. When creating expressions for eCQMs or CDS artifacts with QI-Core for the following clinical data, use the applicable profile directly rather than the generic QICore Observation profile:

- US Core Pediatric Head Occipital-frontal Circumference Percentile Profile
- US Core Blood Pressure Profile
- US Core Average Blood Pressure Profile
- US Core BMI Profile
- US Core Body Height Profile
- US Core Care Experience Preference
- US Core Body Temperature Profile
- US Core Body Weight Profile
- US Core Head Circumference Profile
- US Core Heart Rate Profile
- US Core Pediatric BMI for Age Observation Profile
- US Core Pediatric Weight for Height Observation Profile
- US Core Pulse Oximetry Profile
- US Core Respiratory Rate Profile
- US Core Smoking Status Observation Profile
- US Core Observation Sexual Orientation Profile
- US Core Observation Pregnancy Intent Profile
- US Core Observation Pregnancy Status Profile
- QICore Observation Clinical Result
- QICore Laboratory Result Observation
- QICore Observation Screening Assessment
- US Core Treatment Intervention Preference Profile

As stated in the Home Page, QI-Core derives from US Core and so the requirements on “MustSupport” defined in US Core must be respected. QI-Core further describes and constrains the “MustSupport” functionality.

The following example illustrates the use of the observation profile.

    define "Pap Test with Results":
      [Observation: "Pap Test"] PapTest
        where PapTest.value is not null
          and PapTest.status in { 'final', 'amended', 'corrected', 'preliminary' }

See the patterns page for implementation and usage patterns.

### Examples

Example of a Frailty Observation
Example of a Gestation Age at Birth Observation
Example of a Date and time of obstetric delivery observation
Example of an estimated delivery date observation
Example of a number of preterm births observation
Example of a number of term births observation
Example of a number of parity observation
Example of a number of pregnancies observation

Usages:

- Refer to this Profile: QICore AdverseEvent, QICore Encounter, QICore ImagingStudy, QICore ImmunizationRecommendation... Show 4 more, QICore MedicationRequest, QICore NonPatient Observation, QICore ServiceRequest and QICore Simple Observation
- Examples for this Profile: Observation/example-births, Observation/example-delivery-date-estimate, Observation/example-frailty, Observation/example-gestation... Show 6 more, Observation/example-obstetric-delivery, Observation/example-odh, Observation/example-parity, Observation/example-pregnancies, Observation/example-preterm-births and Observation/example

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | USCoreSimpleObservationProfile | assessment observation Constraints: obs-6, obs-7
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!S Σ | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category | S | 1..* | CodeableConcept | (QI) Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:us-core | S | 0..* | CodeableConcept | Classification of type of observation Binding: US Core Simple Observation Category (required): Note that other codes are permitted, see Required Bindings When Slicing by Value Sets
code | S Σ | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | S Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
effective[x] | S Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime S |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
performer | S Σ | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | S Σ C | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity S |
valueCodeableConcept |  |  | CodeableConcept S |
valueString |  |  | string S |
valueBoolean |  |  | boolean S |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:us-core | Base | required | US Core Simple Observation Category | 📦7.0.0 | US Core v7.0
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | Observation | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | Observation | 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 | error | Observation | 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 | error | Observation | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | Observation | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`
obs-6 | error | Observation | dataAbsentReason SHALL only be present if Observation.value[x] is not present | `dataAbsentReason.empty() or value.empty()`
obs-7 | error | Observation | If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present | `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()`

This structure is derived from USCoreSimpleObservationProfile

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation |  | 0..* | USCoreSimpleObservationProfile | assessment observation
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
partOf |  | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status |  | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown
category |  | 1..* | CodeableConcept | (QI) Classification of type of observation
code |  | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
effective[x] | Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
performer |  | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | Σ | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | USCoreSimpleObservationProfile | assessment observation Constraints: obs-6, obs-7
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!S Σ | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category | S | 1..* | CodeableConcept | (QI) Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:us-core | S | 0..* | CodeableConcept | Classification of type of observation Binding: US Core Simple Observation Category (required): Note that other codes are permitted, see Required Bindings When Slicing by Value Sets
code | S Σ | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | S Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | Σ | 0..1 | Reference(Encounter) | Healthcare event during which this observation is made
effective[x] | S Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime S |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | S Σ | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | S Σ C | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity S |
valueCodeableConcept |  |  | CodeableConcept S |
valueString |  |  | string S |
valueBoolean |  |  | boolean S |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | C | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
note |  | 0..* | Annotation | Comments about the observation
bodySite |  | 0..1 | CodeableConcept | Observed body part Binding: SNOMEDCTBodyStructures (example): Codes describing anatomical locations. May include laterality.
method |  | 0..1 | CodeableConcept | How it was done Binding: ObservationMethods (example): Methods for simple observations.
specimen |  | 0..1 | Reference(Specimen) | Specimen used for this observation
device |  | 0..1 | Reference(Device | DeviceMetric) | (Measurement) Device
referenceRange | C | 0..* | BackboneElement | Provides guide for interpretation Constraints: obs-3
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
low | C | 0..1 | SimpleQuantity | Low Range, if relevant
high | C | 0..1 | SimpleQuantity | High Range, if relevant
type |  | 0..1 | CodeableConcept | Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo |  | 0..* | CodeableConcept | Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age |  | 0..1 | Range | Applicable age range, if relevant
text |  | 0..1 | string | Text based reference range in an observation
hasMember | Σ | 0..* | Reference(Observation | QuestionnaireResponse | MolecularSequence) | Related resource that belongs to the Observation group
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
component | Σ | 0..* | BackboneElement | Component results
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x] | Σ | 0..1 |  | Actual component result
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | C | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange |  | 0..* | See referenceRange (Observation) | Provides guide for interpretation of component result
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.language | Base | preferred | Common Languages | 📦4.0.1 | FHIR Std.
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:us-core | Base | required | US Core Simple Observation Category | 📦7.0.0 | US Core v7.0
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.
Observation.bodySite | Base | example | SNOMED CT Body Structures | 📦4.0.1 | FHIR Std.
Observation.method | Base | example | Observation Methods | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​type | Base | preferred | Observation Reference Range Meaning Codes | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​appliesTo | Base | example | Observation Reference Range Applies To Codes | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | example | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | Observation | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | Observation | 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 | error | Observation | 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 | error | Observation | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | Observation | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`
obs-3 | error | Observation.referenceRange | Must have at least a low or a high or text | `low.exists() or high.exists() or text.exists()`
obs-6 | error | Observation | dataAbsentReason SHALL only be present if Observation.value[x] is not present | `dataAbsentReason.empty() or value.empty()`
obs-7 | error | Observation | If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present | `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()`

This structure is derived from USCoreSimpleObservationProfile

Summary

Mandatory: 2 elements

Structures

This structure refers to these other structures:

- QICore Patient (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-patient)
- QICore Practitioner (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-practitioner)
- QICore Organization (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-organization)
- QICore PractitionerRole (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-practitionerrole)
- QICore CareTeam (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-careteam)
- QICore RelatedPerson (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-relatedperson)
- QICore Simple Observation (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-simple-observation)
- QICore QuestionnaireResponse (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-questionnaireresponse)
- QICore ImagingStudy (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-imagingstudy)
- US Core DocumentReference Profile (http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference)

Slices

This structure defines the following Slices:

- The element 1 is sliced based on the value of Observation.value[x]

Maturity: 4

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | USCoreSimpleObservationProfile | assessment observation Constraints: obs-6, obs-7
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!S Σ | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category | S | 1..* | CodeableConcept | (QI) Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:us-core | S | 0..* | CodeableConcept | Classification of type of observation Binding: US Core Simple Observation Category (required): Note that other codes are permitted, see Required Bindings When Slicing by Value Sets
code | S Σ | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | S Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
effective[x] | S Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime S |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
performer | S Σ | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | S Σ C | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity S |
valueCodeableConcept |  |  | CodeableConcept S |
valueString |  |  | string S |
valueBoolean |  |  | boolean S |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:us-core | Base | required | US Core Simple Observation Category | 📦7.0.0 | US Core v7.0
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | Observation | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | Observation | 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 | error | Observation | 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 | error | Observation | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | Observation | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`
obs-6 | error | Observation | dataAbsentReason SHALL only be present if Observation.value[x] is not present | `dataAbsentReason.empty() or value.empty()`
obs-7 | error | Observation | If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present | `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()`

Differential View

This structure is derived from USCoreSimpleObservationProfile

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation |  | 0..* | USCoreSimpleObservationProfile | assessment observation
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
partOf |  | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status |  | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown
category |  | 1..* | CodeableConcept | (QI) Classification of type of observation
code |  | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
effective[x] | Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
performer |  | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | Σ | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | USCoreSimpleObservationProfile | assessment observation Constraints: obs-6, obs-7
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!S Σ | 1..1 | code | (QI) registered | prliminary | final | amended | corrected | cancelled | entered-in-error | unknown Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category | S | 1..* | CodeableConcept | (QI) Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:us-core | S | 0..* | CodeableConcept | Classification of type of observation Binding: US Core Simple Observation Category (required): Note that other codes are permitted, see Required Bindings When Slicing by Value Sets
code | S Σ | 1..1 | CodeableConcept | (QI) Type of observation (code / type) Binding: LOINCCodes (preferred): This value set specifies the type of observation
subject | S Σ | 1..1 | Reference(QICore Patient) | (QI) Who and/or what the observation is about
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | Σ | 0..1 | Reference(Encounter) | Healthcare event during which this observation is made
effective[x] | S Σ | 0..1 |  | (QI) Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime S |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | S Σ | 0..* | Reference(QICore Practitioner | QICore Organization | QICore Patient | QICore PractitionerRole | QICore CareTeam | QICore RelatedPerson) | (QI) Who is responsible for the observation
value[x] | S Σ C | 0..1 |  | (QI) Actual result Slice: Unordered, Open by type:$this
valueQuantity |  |  | Quantity S |
valueCodeableConcept |  |  | CodeableConcept S |
valueString |  |  | string S |
valueBoolean |  |  | boolean S |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | C | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | (QI) High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
note |  | 0..* | Annotation | Comments about the observation
bodySite |  | 0..1 | CodeableConcept | Observed body part Binding: SNOMEDCTBodyStructures (example): Codes describing anatomical locations. May include laterality.
method |  | 0..1 | CodeableConcept | How it was done Binding: ObservationMethods (example): Methods for simple observations.
specimen |  | 0..1 | Reference(Specimen) | Specimen used for this observation
device |  | 0..1 | Reference(Device | DeviceMetric) | (Measurement) Device
referenceRange | C | 0..* | BackboneElement | Provides guide for interpretation Constraints: obs-3
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
low | C | 0..1 | SimpleQuantity | Low Range, if relevant
high | C | 0..1 | SimpleQuantity | High Range, if relevant
type |  | 0..1 | CodeableConcept | Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo |  | 0..* | CodeableConcept | Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age |  | 0..1 | Range | Applicable age range, if relevant
text |  | 0..1 | string | Text based reference range in an observation
hasMember | Σ | 0..* | Reference(Observation | QuestionnaireResponse | MolecularSequence) | Related resource that belongs to the Observation group
derivedFrom | Σ | 0..* | Reference(QICore Simple Observation | QICore QuestionnaireResponse | QICore ImagingStudy | US Core DocumentReference Profile | Media | MolecularSequence) | (QI) US Core Profiles or other resource the observation is made from
component | Σ | 0..* | BackboneElement | Component results
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x] | Σ | 0..1 |  | Actual component result
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | C | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange |  | 0..* | See referenceRange (Observation) | Provides guide for interpretation of component result
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.language | Base | preferred | Common Languages | 📦4.0.1 | FHIR Std.
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:us-core | Base | required | US Core Simple Observation Category | 📦7.0.0 | US Core v7.0
Observation.code | Base | preferred | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.
Observation.bodySite | Base | example | SNOMED CT Body Structures | 📦4.0.1 | FHIR Std.
Observation.method | Base | example | Observation Methods | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​type | Base | preferred | Observation Reference Range Meaning Codes | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​appliesTo | Base | example | Observation Reference Range Applies To Codes | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | example | LOINC Codes | 📦4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | Observation | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | Observation | 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 | error | Observation | 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 | error | Observation | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | Observation | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`
obs-3 | error | Observation.referenceRange | Must have at least a low or a high or text | `low.exists() or high.exists() or text.exists()`
obs-6 | error | Observation | dataAbsentReason SHALL only be present if Observation.value[x] is not present | `dataAbsentReason.empty() or value.empty()`
obs-7 | error | Observation | If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present | `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()`

This structure is derived from USCoreSimpleObservationProfile

Summary

Mandatory: 2 elements

Structures

This structure refers to these other structures:

- QICore Patient (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-patient)
- QICore Practitioner (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-practitioner)
- QICore Organization (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-organization)
- QICore PractitionerRole (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-practitionerrole)
- QICore CareTeam (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-careteam)
- QICore RelatedPerson (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-relatedperson)
- QICore Simple Observation (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-simple-observation)
- QICore QuestionnaireResponse (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-questionnaireresponse)
- QICore ImagingStudy (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-imagingstudy)
- US Core DocumentReference Profile (http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference)

Slices

This structure defines the following Slices:

- The element 1 is sliced based on the value of Observation.value[x]

Maturity: 4

Other representations of profile: CSV, Excel, Schematron