{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Description:Patient exhibits a severe reaction to the challenge agent.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationValue",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_AllergyTestValue"
  } ],
  "codesystem" : "ec013d25-2aca-5859-85ca-8417fa535d67",
  "concept_id" : "515857f5-9a27-5f5d-a025-43fdea284c7e",
  "ancestors" : {
    "A4" : 0,
    "_AllergyTestValue" : 1
  },
  "id" : "867ce43e-b850-4216-a17c-7f50374e745e",
  "code" : "A4",
  "display" : "severe reaction",
  "version" : "2018-08-12"
}