description: Defines constraints and extensions on the Observation resource for the minimal set of data to query and retrieve laboratory test results
package_name: hl7.fhir.us.core
derivation: constraint
name: USCoreLaboratoryResultObservationProfile
type: Observation
elements:
  category:
    min: 1
    isModifier: false
    type: CodeableConcept
    mustSupport: true
    array: true
    index: 1
    slicing:
      rules: open
      discriminator:
      - {path: $this, type: pattern}
      min: 1
      slices:
        laboratory:
          match:
            coding:
            - {code: laboratory, system: 'http://terminology.hl7.org/CodeSystem/observation-category'}
          schema:
            isModifier: false
            type: CodeableConcept
            mustSupport: true
            _required: true
            pattern:
              type: CodeableConcept
              value:
                coding:
                - {code: laboratory, system: 'http://terminology.hl7.org/CodeSystem/observation-category'}
            index: 2
          min: 1
          max: 1
  value:
    constraint:
      us-core-4:
        human: SHOULD use Snomed CT for coded Results
        severity: warning
        extension:
        - {url: 'http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice', valueBoolean: true}
        expression: valueCodeableConcept.coding.system.empty() or valueCodeableConcept.coding.system = 'http://snomed.info/sct'
      us-core-3: {human: SHALL use UCUM for coded quantity units., severity: error, expression: 'valueQuantity.system.empty() or valueQuantity.system = ''http://unitsofmeasure.org'''}
    isModifier: false
    short: Result Value
    mustSupport: true
    choices: []
    index: 10
  effectiveDateTime:
    constraint:
      us-core-1: {human: Datetime must be at least to day., severity: error, expression: ($this as dateTime).toString().length() >= 8}
    isModifier: false
    type: dateTime
    mustSupport: true
    choiceOf: effective
    index: 7
  status:
    isModifier: false
    type: code
    mustSupport: true
    binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/observation-status'}
    index: 0
  effective:
    constraint:
      us-core-1: {human: Datetime must be at least to day., severity: error, expression: ($this as dateTime).toString().length() >= 8}
    isModifier: false
    mustSupport: true
    choices: [effectiveDateTime, effectivePeriod]
    index: 6
  code:
    isModifier: false
    short: Laboratory Test Name
    type: CodeableConcept
    mustSupport: true
    binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/observation-codes'}
    index: 3
  subject:
    isModifier: false
    refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient']
    type: Reference
    mustSupport: true
    index: 4
  dataAbsentReason:
    isModifier: false
    type: CodeableConcept
    mustSupport: true
    binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/data-absent-reason'}
    index: 11
  effectivePeriod:
    constraint:
      us-core-1: {human: Datetime must be at least to day., severity: error, expression: ($this as dateTime).toString().length() >= 8}
    isModifier: false
    type: Period
    mustSupport: true
    choiceOf: effective
    index: 8
package_version: 2.1.0
class: profile
kind: resource
url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-lab
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 3.0.0
required: [status, subject, category, code]