FHIR Extensions Pack v5.3.0-ballot-tc1 (2025-08-03)

This page is part of the FHIR Core Extensions Registry (v5.3.0-ballot-tc1: Release 5.3) based on FHIR (HL7® FHIR® Standard) v5.0.0. This version is a pre-release. The current official version is 5.2.0. For a full list of available versions, see the Directory of published versions

10.1.65 Resource Observation - Extensions

Orders and Observations Work GroupMaturity Level: N/AStandards Status: InformativeSecurity Category: N/A Compartments: N/A

This table lists extensions for the Observation resource defined in association with the core specification. For background information, see Extensibility. Additional extensions may be found in published Implementation Guides and in the Conformance resource registry .

Identity Card. Type Context WG Status Δ v5.2.0
Extensions defined for the Observation resource
bodySite 0..1 Reference Condition.bodySite , Observation.bodySite , Procedure.bodySite , MedicationAdministration.dosage ,
Dosage.site , Specimen.collection 		fhir Trial-Use : FMM3 n/c
device-gateway 0..* CodeableReference Device , Observation oo Trial-Use : FMM1 icon Added:
diagnosticReport-risk 0..* Reference DiagnosticReport , Observation oo Trial-Use : FMM3 n/c
event-eventHistory 0..* Reference Observation , DiagnosticReport , Task , SupplyDelivery , DeviceUsage fhir Trial-Use : FMM3 n/c
event-location 0..1 Reference Observation , DiagnosticReport , DocumentReference , MedicationDispense ,
MedicationAdministration , SupplyDelivery 		fhir Trial-Use : FMM3 n/c
event-performerFunction 0..1 CodeableConcept Observation.performer , DiagnosticReport.performer , DocumentReference.author ,
Consent.grantee 		fhir Trial-Use : FMM3 n/c
event-statusReason 0..1 CodeableConcept Observation , DiagnosticReport , DocumentReference , SupplyDelivery ,
DeviceUsage 		fhir Trial-Use : FMM3 n/c
note 0..* Annotation Resource , Composition.section , Observation.component fhir Trial-Use : FMM1 n/c
observation-analysis-date-time 0..1 dateTime Observation oo Trial-Use : FMM0 n/c
observation-bodyPosition 0..1 CodeableConcept Observation , Specimen.collection oo Trial-Use : FMM3 n/c
observation-componentCategory 0..* CodeableConcept Observation.component oo Trial-Use : FMM0 n/c
observation-delta 0..1 CodeableConcept Observation oo Deprecated : FMM3 icon Changed:
observation-deviceCode 0..1 CodeableConcept Observation oo Trial-Use : FMM3 icon Changed:
observation-focusCode 0..1 CodeableConcept Observation oo Deprecated : FMM3 n/c
observation-gatewayDevice 0..1 Reference Observation oo Deprecated : FMM3 icon Changed:
observation-geneticsAllele 0..1 (complex) Observation oo Deprecated : FMM1 n/c
observation-geneticsAminoAcidChange 0..1 (complex) Observation oo Deprecated : FMM1 n/c
observation-geneticsAncestry 0..1 (complex) Observation oo Deprecated : FMM1 n/c
observation-geneticsCopyNumberEvent 0..1 CodeableConcept Observation oo Deprecated : FMM1 n/c
observation-geneticsDNARegionName 0..1 string Observation oo Deprecated : FMM1 n/c
observation-geneticsGene 0..1 CodeableConcept Observation oo Deprecated : FMM1 n/c
observation-geneticsGenomicSourceClass 0..1 CodeableConcept Observation oo Deprecated : FMM1 n/c
observation-geneticsInterpretation 0..1 Reference Observation oo Deprecated : FMM1 n/c
observation-geneticsPhaseSet 0..* (complex) Observation oo Deprecated : FMM1 n/c
observation-geneticsVariant 0..1 (complex) Observation oo Deprecated : FMM1 n/c
observation-nature-of-abnormal-test 0..* CodeableConcept Observation oo Trial-Use : FMM0 n/c
observation-precondition 0..* Reference Observation oo Trial-Use : FMM3 icon Changed:
observation-reagent 0..* Reference Observation oo Trial-Use : FMM3 n/c
observation-replaces 0..* Reference Observation oo Trial-Use : FMM3 n/c
observation-secondaryFinding 0..1 CodeableConcept Observation oo Trial-Use : FMM3 n/c
observation-sequelTo 0..* Reference Observation oo Trial-Use : FMM3 n/c
observation-specimenCode 0..1 CodeableConcept Observation oo Deprecated : FMM3 n/c
observation-structure-type 0..1 CodeableConcept Observation oo Draft : FMM1 n/c
observation-structureLaterality 0..1 CodeableConcept Observation.bodySite oo Trial-Use : FMM1 icon Added:
observation-timeOffset 0..* integer Observation.component oo Trial-Use : FMM3 n/c
observation-v2-subid 0..1 (complex) Observation oo Trial-Use : FMM0 n/c
quantity-accuracy 0..1 Quantity Observation.value[x] , Observation.component.value[x] , DeviceMetric.measurementFrequency oo Experimental
Draft : FMM0 		icon Added:
quantity-confidenceInterval 0..1 (Choice) Observation.value[x] , Observation.component.value[x] oo Experimental
Draft : FMM0 		icon Added:
workflow-adheresTo 0..* (Choice) CarePlan , Condition , Communication , DiagnosticReport , DocumentReference ,
Encounter , FamilyMemberHistory , Immunization , ImmunizationEvaluation ,
Observation , Procedure , QuestionnaireResponse , SupplyDelivery 		fhir Trial-Use : FMM2 icon Changed:
workflow-episodeOfCare 0..* Reference AdverseEvent , Appointment , Basic , CarePlan , ClinicalImpression , Communication ,
CommunicationRequest , Composition , Condition , Consent , DetectedIssue ,
DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , EnrollmentRequest ,
EnrollmentResponse , FamilyMemberHistory , Flag , Goal , ImagingStudy ,
Immunization , ImmunizationEvaluation , ImmunizationRecommendation ,
Invoice , List , MeasureReport , MedicationAdministration , MedicationDispense ,
MedicationRequest , MedicationStatement , MolecularSequence , NutritionIntake ,
NutritionOrder , Observation , Procedure , QuestionnaireResponse , RequestOrchestration ,
RequestGroup, ResearchSubject , RiskAssessment , SupplyDelivery , SupplyRequest ,
VisionPrescription , ServiceRequest , ChargeItem 		fhir Trial-Use : FMM3 n/c
workflow-instantiatesCanonical 0..* canonical Observation , DiagnosticReport , Media, Condition , SupplyDelivery , CommunicationRequest ,
SupplyRequest 		fhir Deprecated : FMM1 n/c
workflow-instantiatesUri 0..* uri Observation , DiagnosticReport , Media, Condition , SupplyDelivery , CommunicationRequest ,
SupplyRequest 		fhir Deprecated : FMM1 n/c
workflow-reason 0..* CodeableReference Observation , DiagnosticReport , DocumentReference , Flag , NutritionOrder fhir Trial-Use : FMM2 icon Changed:
workflow-reasonCode 0..* CodeableConcept Observation , DiagnosticReport , Media, NutritionOrder fhir Deprecated : FMM1 n/c
workflow-reasonReference 0..* Reference Observation , DiagnosticReport , Media, NutritionOrder fhir Deprecated : FMM1 n/c
workflow-relatedArtifact 0..* RelatedArtifact ConceptMap , DiagnosticReport , Observation , Observation.component fhir Trial-Use : FMM3 n/c
workflow-researchStudy 0..* Reference Composition , Consent , DeviceUsage , DiagnosticReport , Encounter , FamilyMemberHistory ,
Immunization , DocumentReference , MedicationAdministration , MedicationDispense ,
MedicationStatement , Observation , Procedure , QuestionnaireResponse ,
RiskAssessment , ServiceRequest , SupplyDelivery , Task 		fhir Trial-Use : FMM3 n/c
workflow-supportingInfo 0..* Reference DiagnosticReport , DocumentReference , Encounter , Observation , CommunicationRequest fhir Trial-Use : FMM3 n/c
workflow-triggeredBy 0..1 (Choice) CarePlan , CarePlan.activity.plannedActivityReference , CommunicationRequest ,
DeviceRequest , Encounter , ImmunizationRecommendation , NutritionOrder ,
Procedure , RequestOrchestration , RequestGroup, SupplyRequest , ServiceRequest ,
Task , Condition , Communication , DiagnosticReport , DocumentReference ,
FamilyMemberHistory , Immunization , Observation , QuestionnaireResponse ,
SupplyDelivery 		fhir Trial-Use : FMM2 icon Changed:
Extensions defined for many resources including the Observation resource
datatype 0..1 string Base fhir Trial-Use : FMM2 icon Changed:
artifact-extended-contact-detail 0..* ExtendedContactDetail Resource cds Trial-Use : FMM2 icon Added:
artifact-isOwned 0..1 boolean RelatedArtifact , ActivityDefinition.library , PlanDefinition.library ,
Measure.library , DomainResource.extension , type.exists() and type = 'composed-of' 		cds Trial-Use : FMM1 n/c
artifact-jurisdiction 0..* CodeableConcept Resource cds Trial-Use : FMM2 icon Changed:
artifactassessment-disposition 0..1 code Resource cds Draft : FMM1 n/c
artifactassessment-workflowStatus 0..1 code Resource cds Draft : FMM1 n/c
cqf-artifactComment 0..* (complex) Resource cds Trial-Use : FMM3 n/c
cqf-citation 0..1 string Resource cds Trial-Use : FMM3 n/c
cqf-definitionTerm 0..1 (complex) Resource cds Trial-Use : FMM3 n/c
cqf-directReferenceCode 0..* Coding Resource cds Trial-Use : FMM2 n/c
cqf-knowledgeCapability 0..* code DomainResource cds Trial-Use : FMM2 n/c
cqf-knowledgeRepresentationLevel 0..* code DomainResource cds Trial-Use : FMM2 n/c
cqf-library 0..* canonical DomainResource cds Trial-Use : FMM3 icon Changed:
cqf-logicDefinition 0..* (complex) DomainResource cds Trial-Use : FMM2 n/c
cqf-measureInfo 0..* (complex) Resource , Reference cds Trial-Use : FMM3 n/c
cqf-messages 0..* Reference Resource cds Trial-Use : FMM3 n/c
cqf-scope 0..1 string Resource cds Trial-Use : FMM1 n/c
derivation-reference 0..* (complex) Resource , Element fhir Trial-Use : FMM2 icon Changed:
feature-assertion 0..* Coding Provenance.target , Resource.meta fhir Experimental
Draft : FMM0 		n/c
note 0..* Annotation Resource , Composition.section , Observation.component fhir Trial-Use : FMM1 n/c
obligations-profile 0..* (complex) Provenance.target , Resource.meta fhir Experimental
Draft : FMM0 		n/c
package-source 0..* (complex) Resource , Meta fhir Trial-Use : FMM1 n/c
patient-sexParameterForClinicalUse 0..* (complex) Resource pa Experimental
Draft : FMM1 		icon Changed:
resource-instance-description 0..1 markdown Resource fhir Trial-Use : FMM2 icon Changed:
resource-instance-name 0..1 string Resource fhir Trial-Use : FMM2 icon Changed:
resource-pertainsToGoal 0..* Reference Resource fhir Trial-Use : FMM3 n/c
satisfies-requirement 0..* (complex) Resource , Element fhir Trial-Use : FMM2 icon Changed:
structuredefinition-fmm 0..1 integer DomainResource , Resource fhir Trial-Use : FMM3 n/c
structuredefinition-fmm-support 0..1 markdown DomainResource fhir Trial-Use : FMM2 icon Changed:
structuredefinition-wg 0..1 code DomainResource fhir Trial-Use : FMM3 n/c
version-specific-use 0..* (complex) Element , Resource fhir Trial-Use : FMM1 n/c
version-specific-value 0..* (complex) Element , Resource fhir Trial-Use : FMM1 n/c
workflow-statusReason 0..* CodeableConcept DomainResource fhir Trial-Use : FMM2 icon Added:
Extensions that refer to the Observation resource
family-member-history-genetics-observation 0..* Reference FamilyMemberHistory cg Trial-Use : FMM3 n/c
observation-geneticsInterpretation 0..1 Reference Observation oo Deprecated : FMM1 n/c
observation-precondition 0..* Reference Observation oo Trial-Use : FMM3 icon Changed:
observation-replaces 0..* Reference Observation oo Trial-Use : FMM3 n/c
observation-sequelTo 0..* Reference Observation oo Trial-Use : FMM3 n/c
procedure-causedBy 0..* Reference Procedure pc Trial-Use : FMM3 n/c
servicerequest-geneticsItem 0..* (complex) DiagnosticReport oo Deprecated : FMM1 n/c
workflow-reason 0..* CodeableReference Observation , DiagnosticReport , DocumentReference , Flag , NutritionOrder fhir Trial-Use : FMM2 icon Changed:
workflow-reasonReference 0..* Reference Observation , DiagnosticReport , Media, NutritionOrder fhir Deprecated : FMM1 n/c
Extensions that refer to many resources including the Observation resource
alternate-reference 0..1 Reference Reference fhir Trial-Use : FMM2 icon Changed:
artifact-reference 0..1 (Choice) Element cds Deprecated : FMM1 icon Changed:
cqf-relativeDateTime 0..1 (complex) Element cds Deprecated : FMM3 n/c
diagnosticReport-focus 0..* Reference DiagnosticReport oo Experimental
Draft : FMM0 		icon Changed:
diagnosticreport-interpretationContext 0..* CodeableReference DiagnosticReport oo Draft : FMM0 icon Added:
event-basedOn 0..* Reference Condition , ChargeItem , ClinicalImpression , Composition , Consent , Coverage ,
EpisodeOfCare , ExplanationOfBenefit , FamilyMemberHistory , ImmunizationEvaluation ,
InventoryReport , MedicationStatement , PaymentNotice , PaymentReconciliation 		fhir Trial-Use : FMM3 n/c
event-partOf 0..* Reference DiagnosticReport , Condition fhir Trial-Use : FMM3 n/c
flag-detail 0..* Reference Flag pc Trial-Use : FMM3 n/c
patient-sexParameterForClinicalUse 0..* (complex) Resource pa Experimental
Draft : FMM1 		icon Changed:
replaces 0..* canonical ActorDefinition , CapabilityStatement , ChargeItemDefinition , CompartmentDefinition ,
ConditionDefinition , ExampleScenario , GraphDefinition , ImplementationGuide ,
MessageDefinition , ObservationDefinition , OperationDefinition , Questionnaire ,
Requirements , SearchParameter , SpecimenDefinition , StructureDefinition ,
StructureMap , SubscriptionTopic , TerminologyCapabilities , TestScript 		fhir Trial-Use : FMM3 n/c
request-replaces 0..* Reference NutritionOrder , SupplyRequest , Task fhir Trial-Use : FMM3 n/c
workflow-barrier 0..* CodeableReference Goal , CommunicationRequest , CarePlan.activity fhir Trial-Use : FMM2 icon Changed:
workflow-protectiveFactor 0..* CodeableReference Goal , CommunicationRequest , CarePlan.activity fhir Trial-Use : FMM2 icon Changed:
workflow-supportingInfo 0..* Reference DiagnosticReport , DocumentReference , Encounter , Observation , CommunicationRequest fhir Trial-Use : FMM3 n/c

110 Extensions

Extension Search Parameters

This table lists search parameters defined for any of the extensions listed above in association with the core specification.