description: Measurements and simple assertions made about a patient, device or other subject. package_name: hl7.fhir.r4.core derivation: specialization name: Observation type: Observation elements: category: short: Classification of type of observation type: CodeableConcept array: true binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/observation-category'} index: 4 referenceRange: constraint: obs-3: {human: Must have at least a low or a high or text, severity: error, expression: low.exists() or high.exists() or text.exists()} short: Provides guide for interpretation type: BackboneElement array: true index: 37 elements: low: {short: 'Low Range, if relevant', type: Quantity, index: 38} high: {short: 'High Range, if relevant', type: Quantity, index: 39} type: short: Reference range qualifier type: CodeableConcept binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/referencerange-meaning'} index: 40 appliesTo: short: Reference range population type: CodeableConcept array: true binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/referencerange-appliesto'} index: 41 age: {short: 'Applicable age range, if relevant', type: Range, index: 42} text: {type: string, short: Text based reference range in an observation, index: 43} hasMember: short: Related resource that belongs to the Observation group refers: ['http://hl7.org/fhir/StructureDefinition/MolecularSequence', 'http://hl7.org/fhir/StructureDefinition/Observation', 'http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse'] type: Reference array: true isSummary: true index: 44 derivedFrom: short: Related measurements the observation is made from refers: ['http://hl7.org/fhir/StructureDefinition/DocumentReference', 'http://hl7.org/fhir/StructureDefinition/ImagingStudy', 'http://hl7.org/fhir/StructureDefinition/Media', 'http://hl7.org/fhir/StructureDefinition/MolecularSequence', 'http://hl7.org/fhir/StructureDefinition/Observation', 'http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse'] type: Reference array: true isSummary: true index: 45 interpretation: short: High, low, normal, etc. type: CodeableConcept array: true binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/observation-interpretation'} index: 31 encounter: short: Healthcare event during which this observation is made refers: ['http://hl7.org/fhir/StructureDefinition/Encounter'] type: Reference isSummary: true index: 8 method: short: How it was done type: CodeableConcept binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/observation-methods'} index: 34 valueTime: {short: Actual result, type: time, choiceOf: value, isSummary: true, index: 27} specimen: short: Specimen used for this observation refers: ['http://hl7.org/fhir/StructureDefinition/Specimen'] type: Reference index: 35 valueQuantity: {short: Actual result, type: Quantity, choiceOf: value, isSummary: true, index: 19} value: short: Actual result choices: [valueQuantity, valueCodeableConcept, valueString, valueBoolean, valueInteger, valueRange, valueRatio, valueSampledData, valueTime, valueDateTime, valuePeriod] isSummary: true index: 18 valueString: {short: Actual result, type: string, choiceOf: value, isSummary: true, index: 21} valueRatio: {short: Actual result, type: Ratio, choiceOf: value, isSummary: true, index: 25} valueBoolean: {short: Actual result, type: boolean, choiceOf: value, isSummary: true, index: 22} valueDateTime: {short: Actual result, type: dateTime, choiceOf: value, isSummary: true, index: 28} component: short: Component results type: BackboneElement array: true isSummary: true index: 46 elements: referenceRange: elementReference: ['http://hl7.org/fhir/StructureDefinition/Observation', elements, referenceRange] short: Provides guide for interpretation of component result array: true index: 63 interpretation: short: High, low, normal, etc. type: CodeableConcept array: true binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/observation-interpretation'} index: 62 valueTime: {short: Actual component result, type: time, choiceOf: value, isSummary: true, index: 58} valueQuantity: {short: Actual component result, type: Quantity, choiceOf: value, isSummary: true, index: 50} value: short: Actual component result choices: [valueQuantity, valueCodeableConcept, valueString, valueBoolean, valueInteger, valueRange, valueRatio, valueSampledData, valueTime, valueDateTime, valuePeriod] isSummary: true index: 49 valueString: {short: Actual component result, type: string, choiceOf: value, isSummary: true, index: 52} valueRatio: {short: Actual component result, type: Ratio, choiceOf: value, isSummary: true, index: 56} valueBoolean: {short: Actual component result, type: boolean, choiceOf: value, isSummary: true, index: 53} valueDateTime: {short: Actual component result, type: dateTime, choiceOf: value, isSummary: true, index: 59} valueSampledData: {short: Actual component result, type: SampledData, choiceOf: value, isSummary: true, index: 57} code: short: Type of component observation (code / type) type: CodeableConcept binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/observation-codes'} isSummary: true index: 47 valueCodeableConcept: {short: Actual component result, type: CodeableConcept, choiceOf: value, isSummary: true, index: 51} valuePeriod: {short: Actual component result, type: Period, choiceOf: value, isSummary: true, index: 60} valueRange: {short: Actual component result, type: Range, choiceOf: value, isSummary: true, index: 55} valueInteger: {short: Actual component result, type: integer, choiceOf: value, isSummary: true, index: 54} dataAbsentReason: short: Why the component result is missing type: CodeableConcept binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/data-absent-reason'} index: 61 required: [code] note: {short: Comments about the observation, type: Annotation, array: true, index: 32} valueSampledData: {short: Actual result, type: SampledData, choiceOf: value, isSummary: true, index: 26} effectiveDateTime: {short: Clinically relevant time/time-period for observation, type: dateTime, choiceOf: effective, isSummary: true, index: 11} status: isModifier: true short: registered | preliminary | final | amended + type: code binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/observation-status|4.0.1'} isModifierReason: This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid isSummary: true index: 3 effective: short: Clinically relevant time/time-period for observation choices: [effectiveDateTime, effectivePeriod, effectiveTiming, effectiveInstant] isSummary: true index: 10 code: short: Type of observation (code / type) type: CodeableConcept binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/observation-codes'} isSummary: true index: 5 identifier: {short: Business Identifier for observation, type: Identifier, array: true, isSummary: true, index: 0} effectiveTiming: {short: Clinically relevant time/time-period for observation, type: Timing, choiceOf: effective, isSummary: true, index: 13} valueCodeableConcept: {short: Actual result, type: CodeableConcept, choiceOf: value, isSummary: true, index: 20} bodySite: short: Observed body part type: CodeableConcept binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/body-site'} index: 33 focus: short: What the observation is about, when it is not about the subject of record refers: ['http://hl7.org/fhir/StructureDefinition/Resource'] type: Reference array: true isSummary: true index: 7 issued: {short: Date/Time this version was made available, type: instant, isSummary: true, index: 15} valuePeriod: {short: Actual result, type: Period, choiceOf: value, isSummary: true, index: 29} device: short: (Measurement) Device refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://hl7.org/fhir/StructureDefinition/DeviceMetric'] type: Reference index: 36 effectiveInstant: {short: Clinically relevant time/time-period for observation, type: instant, choiceOf: effective, isSummary: true, index: 14} basedOn: short: Fulfills plan, proposal or order refers: ['http://hl7.org/fhir/StructureDefinition/CarePlan', 'http://hl7.org/fhir/StructureDefinition/DeviceRequest', 'http://hl7.org/fhir/StructureDefinition/ImmunizationRecommendation', 'http://hl7.org/fhir/StructureDefinition/MedicationRequest', 'http://hl7.org/fhir/StructureDefinition/NutritionOrder', 'http://hl7.org/fhir/StructureDefinition/ServiceRequest'] type: Reference array: true isSummary: true index: 1 valueRange: {short: Actual result, type: Range, choiceOf: value, isSummary: true, index: 24} partOf: short: Part of referenced event refers: ['http://hl7.org/fhir/StructureDefinition/ImagingStudy', 'http://hl7.org/fhir/StructureDefinition/Immunization', 'http://hl7.org/fhir/StructureDefinition/MedicationAdministration', 'http://hl7.org/fhir/StructureDefinition/MedicationDispense', 'http://hl7.org/fhir/StructureDefinition/MedicationStatement', 'http://hl7.org/fhir/StructureDefinition/Procedure'] type: Reference array: true isSummary: true index: 2 valueInteger: {short: Actual result, type: integer, choiceOf: value, isSummary: true, index: 23} subject: short: Who and/or what the observation is about refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://hl7.org/fhir/StructureDefinition/Group', 'http://hl7.org/fhir/StructureDefinition/Location', 'http://hl7.org/fhir/StructureDefinition/Patient'] type: Reference isSummary: true index: 6 performer: short: Who is responsible for the observation refers: ['http://hl7.org/fhir/StructureDefinition/CareTeam', 'http://hl7.org/fhir/StructureDefinition/Organization', 'http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/PractitionerRole', 'http://hl7.org/fhir/StructureDefinition/RelatedPerson'] type: Reference array: true isSummary: true index: 16 dataAbsentReason: short: Why the result is missing type: CodeableConcept binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/data-absent-reason'} index: 30 effectivePeriod: {short: Clinically relevant time/time-period for observation, type: Period, choiceOf: effective, isSummary: true, index: 12} package_version: 4.0.1 class: resource kind: resource url: http://hl7.org/fhir/StructureDefinition/Observation base: http://hl7.org/fhir/StructureDefinition/DomainResource version: 4.0.1 required: [status, code]