description: The US Core Simple Observation Profile inherits from the FHIR [Observation](https://hl7.org/fhir/R4/observation.html) resource; refer to it for scope and usage definitions. This US Core FHIR Profile captures any \"simple\" observations not covered by other US Core Observation profiles. It represents any observation not classified as vital signs, laboratory,  imaging, or other specific observation types. This profile sets minimum expectations for the Observation resource to record, search, and retrieve observations such as a clinical observation or assertion about patient health status or other general observations. It specifies which core elements, extensions, vocabularies, and value sets **SHALL** be present and constrains how the elements are used. Providing the floor for standards development for specific use cases promotes interoperability and adoption.
package_name: hl7.fhir.us.core
derivation: constraint
name: USCoreSimpleObservationProfile
type: Observation
elements:
  category:
    mustSupport: true
    index: 1
    slicing:
      rules: open
      discriminator:
      - {path: $this, type: value}
      min: 1
      slices:
        us-core:
          match: {}
          schema:
            short: '𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗨𝗦𝗖𝗗𝗜: US Core classification of type of observation'
            binding: {strength: required, valueSet: 'http://hl7.org/fhir/us/core/ValueSet/us-core-simple-observation-category'}
            mustSupport: false
            index: 2
          min: 0
  derivedFrom:
    type: Reference
    short: '𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗨𝗦𝗖𝗗𝗜: US Core Profiles or other resource the observation is made from'
    mustSupport: false
    refers: ['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/us/core/StructureDefinition/us-core-documentreference', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-questionnaireresponse']
    index: 25
  valueTime: {type: time, mustSupport: true, choiceOf: value, index: 22}
  valueQuantity: {type: Quantity, mustSupport: true, choiceOf: value, index: 14}
  value:
    mustSupport: true
    choices: [valueQuantity, valueCodeableConcept, valueString, valueBoolean, valueInteger, valueRange, valueRatio, valueSampledData, valueTime, valueDateTime, valuePeriod]
    index: 13
  valueString: {type: string, mustSupport: true, choiceOf: value, index: 16}
  valueRatio: {type: Ratio, mustSupport: true, choiceOf: value, index: 20}
  valueBoolean: {type: boolean, mustSupport: true, choiceOf: value, index: 17}
  valueDateTime: {type: dateTime, mustSupport: true, choiceOf: value, index: 23}
  valueSampledData: {type: SampledData, mustSupport: true, choiceOf: value, index: 21}
  effectiveDateTime: {type: dateTime, mustSupport: true, choiceOf: effective, index: 7}
  status: {mustSupport: true, index: 0}
  effective:
    mustSupport: true
    choices: [effectiveDateTime, effectivePeriod, effectiveTiming, effectiveInstant]
    index: 6
  code: {mustSupport: true, index: 3}
  effectiveTiming: {type: Timing, mustSupport: true, choiceOf: effective, index: 9}
  valueCodeableConcept: {type: CodeableConcept, mustSupport: true, choiceOf: value, index: 15}
  valuePeriod: {type: Period, mustSupport: true, choiceOf: value, index: 24}
  effectiveInstant: {type: instant, mustSupport: true, choiceOf: effective, index: 10}
  valueRange: {type: Range, mustSupport: true, choiceOf: value, index: 19}
  valueInteger: {type: integer, mustSupport: true, choiceOf: value, index: 18}
  subject:
    type: Reference
    mustSupport: true
    refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://hl7.org/fhir/StructureDefinition/Group', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-location', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient']
    index: 4
  performer:
    type: Reference
    mustSupport: true
    refers: ['http://hl7.org/fhir/StructureDefinition/PractitionerRole', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-careteam', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-organization', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-practitioner', 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-relatedperson']
    index: 11
  effectivePeriod: {type: Period, mustSupport: true, choiceOf: effective, index: 8}
package_version: 8.0.0-ballot
class: profile
kind: resource
url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-simple-observation
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 8.0.0-ballot
required: [subject, category]