The following data for a patient can be recorded:

• travel history as a string, an address, or a coded location
• the date or period of time spent in the location (Observation.effectiveTime)
  • it is important to accurately capture the most accurate dates possible
  • the focus should be on date of arrival and date of departure
  • the concepts of dates as related to travel are especially useful for determining need for Federal Public Health Notifications (FPHNs) and these dates are used to alert foreign ministries of health about their residents who may have been contacts of cases, or if a flight that was outbound from the USA had an infectious traveler on it
• most uses will involve a single location (Observation.component), however, it is possible to specify multiple locations (but there is only a single effectiveTime)
  • this allows for cases where a patient cannot remember exact dates of travel (e.g. I traveled to London, Paris, and Berlin in July and August 2016)
• free text describing the travel history details and location (Observation.component.valueCodeableConcept.text element)
• use Observation.component.codeableConcept to record a coded location
• use Observationcomponent.extension to record a specific address
• where a more granular address than state is known (e.g. city, street) it is appropriate to use the extension to record an address rather than using the coded location

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

This structure is derived from Observation

Name	Flags	Card.	Type	Description & Constraints
Observation		0..*	Observation	Measurements and simple assertions
code	S	1..1	CodeableConcept	Type of observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
subject	S	1..1	Reference(US Public Health Patient)	Who and/or what the observation is about
effective[x]	S	1..1	dateTime, Period, Timing, instant	Date or period of time spent in the location
hasMember	S	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
Slices for component	S	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:travelLocation	S	1..*	BackboneElement	Travel location
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
code	S	1..1	CodeableConcept	Type of component observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
value[x]	S	0..1	CodeableConcept	Actual component result
coding	S	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	S	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
component:travelPurpose	S	0..*	BackboneElement	Purpose of travel
code	S	1..1	CodeableConcept	Type of component observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
value[x]	S	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	Observation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
code	SΣ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
subject	SΣ	1..1	Reference(US Public Health Patient)	Who and/or what the observation is about
effective[x]	SΣ	1..1		Date or period of time spent in the location
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
hasMember	SΣ	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
Slices for component	SΣ	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:All Slices				Content/Rules for all slices
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.
component:travelLocation	SΣ	1..*	BackboneElement	Travel location
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
value[x]	SΣ	0..1	CodeableConcept	Actual component result
coding	SΣ	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	SΣ	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
component:travelPurpose	SΣ	0..*	BackboneElement	Purpose of travel
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
value[x]	SΣ	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.code	example	Pattern: SNOMED-CT Code 420008001 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.code	example	Pattern: LOC("Location") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelPurpose.code	example	Pattern: SNOMED-CT Code 280147009 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	Observation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
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
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	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		0..*	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
code	SΣ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
subject	SΣ	1..1	Reference(US Public Health Patient)	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]	SΣ	1..1		Date or period of time spent in the location
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
issued	Σ	0..1	instant	Date/Time this version was made available
performer	Σ	0..*	Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)	Who is responsible for the observation
value[x]	ΣC	0..1		Actual 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 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.
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 obs-3: Must have at least a low or a high or text
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	SΣ	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
derivedFrom	Σ	0..*	Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)	Related measurements the observation is made from
Slices for component	SΣ	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:All Slices				Content/Rules for all slices
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
component:travelLocation	SΣ	1..*	BackboneElement	Travel location
id		0..1	string	Unique id for inter-element referencing
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
Slices for extension				Content/Rules for all slices
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
value[x]	SΣ	0..1	CodeableConcept	Actual component result
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	SΣ	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	SΣ	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
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
component:travelPurpose	SΣ	0..*	BackboneElement	Purpose of travel
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	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
value[x]	SΣ	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
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	Conformance	ValueSet / Code	URI
Observation.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding http://hl7.org/fhir/ValueSet/languages from the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Pattern: SNOMED-CT Code 420008001 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.bodySite	example	SNOMEDCTBodyStructures http://hl7.org/fhir/ValueSet/body-site from the FHIR Standard
Observation.method	example	ObservationMethods http://hl7.org/fhir/ValueSet/observation-methods from the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning from the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:travelLocation.code	example	Pattern: LOC("Location") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelLocation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:travelLocation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:travelPurpose.code	example	Pattern: SNOMED-CT Code 280147009 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108
Observation.component:travelPurpose.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:travelPurpose.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard

Differential View

This structure is derived from Observation

Name	Flags	Card.	Type	Description & Constraints
Observation		0..*	Observation	Measurements and simple assertions
code	S	1..1	CodeableConcept	Type of observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
subject	S	1..1	Reference(US Public Health Patient)	Who and/or what the observation is about
effective[x]	S	1..1	dateTime, Period, Timing, instant	Date or period of time spent in the location
hasMember	S	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
Slices for component	S	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:travelLocation	S	1..*	BackboneElement	Travel location
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
code	S	1..1	CodeableConcept	Type of component observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
value[x]	S	0..1	CodeableConcept	Actual component result
coding	S	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	S	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
component:travelPurpose	S	0..*	BackboneElement	Purpose of travel
code	S	1..1	CodeableConcept	Type of component observation (code / type) Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
value[x]	S	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108

Key Elements View

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	Observation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
code	SΣ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
subject	SΣ	1..1	Reference(US Public Health Patient)	Who and/or what the observation is about
effective[x]	SΣ	1..1		Date or period of time spent in the location
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
hasMember	SΣ	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
Slices for component	SΣ	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:All Slices				Content/Rules for all slices
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.
component:travelLocation	SΣ	1..*	BackboneElement	Travel location
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
value[x]	SΣ	0..1	CodeableConcept	Actual component result
coding	SΣ	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	SΣ	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
component:travelPurpose	SΣ	0..*	BackboneElement	Purpose of travel
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
value[x]	SΣ	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.code	example	Pattern: SNOMED-CT Code 420008001 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.code	example	Pattern: LOC("Location") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelPurpose.code	example	Pattern: SNOMED-CT Code 280147009 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108

Snapshot View

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	Observation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
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
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	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		0..*	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
code	SΣ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 420008001
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
subject	SΣ	1..1	Reference(US Public Health Patient)	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]	SΣ	1..1		Date or period of time spent in the location
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
issued	Σ	0..1	instant	Date/Time this version was made available
performer	Σ	0..*	Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)	Who is responsible for the observation
value[x]	ΣC	0..1		Actual 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 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.
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 obs-3: Must have at least a low or a high or text
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	SΣ	0..*	Reference(US Public Health Transportation Details | US Public Health Exposure Contact Information)	Related resource that belongs to the Observation group
derivedFrom	Σ	0..*	Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)	Related measurements the observation is made from
Slices for component	SΣ	1..*	BackboneElement	Component results Slice: Unordered, Open by value:code
component:All Slices				Content/Rules for all slices
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
component:travelLocation	SΣ	1..*	BackboneElement	Travel location
id		0..1	string	Unique id for inter-element referencing
Slices for extension	S	0..*	Extension	Extension Slice: Unordered, Open by value:url
Slices for extension				Content/Rules for all slices
travelHistoryAddress	S	0..1	Address	Travel history address URL: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ParticipationType
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: LOC
display		1..1	string	Representation defined by the system Fixed Value: Location
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
value[x]	SΣ	0..1	CodeableConcept	Actual component result
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	SΣ	0..*	Coding	Code defined by a terminology system Binding: Geographical location history (extensible): Geographical Location History Example for coding: {"system":"urn:iso:std:iso:3166","code":"FJI","display":"Fiji"}
text	SΣ	0..1	string	Plain text representation of the concept Example for text: Spent 8 years in the UK during the BSE outbreak
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
component:travelPurpose	SΣ	0..*	BackboneElement	Purpose of travel
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	SΣ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 280147009
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
value[x]	SΣ	1..1	CodeableConcept	Actual component result Binding: Travel Purpose (preferred): Travel Purpose
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	Conformance	ValueSet / Code	URI
Observation.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding http://hl7.org/fhir/ValueSet/languages from the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Pattern: SNOMED-CT Code 420008001 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.bodySite	example	SNOMEDCTBodyStructures http://hl7.org/fhir/ValueSet/body-site from the FHIR Standard
Observation.method	example	ObservationMethods http://hl7.org/fhir/ValueSet/observation-methods from the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning from the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:travelLocation.code	example	Pattern: LOC("Location") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelLocation.value[x].coding	extensible	PHVS_GeographicLocationHistory_CDC http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3201
Observation.component:travelLocation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:travelLocation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:travelPurpose.code	example	Pattern: SNOMED-CT Code 280147009 http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:travelPurpose.value[x]	preferred	PHVS_TravelPurpose_FDD http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.114222.4.11.3108
Observation.component:travelPurpose.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:travelPurpose.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard

This structure is derived from Observation

Summary

Mandatory: 4 elements(1 nested mandatory element)
Must-Support: 15 elements

Structures

This structure refers to these other structures:

• US Public Health Patient (http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-patient)
• US Public Health Transportation Details (http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-transportation-details)
• US Public Health Exposure Contact Information (http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-exposure-contact-information)

Extensions

This structure refers to these extensions:

• http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-address-extension

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of Observation.component