{
  "package" : "hl7.terminology.r5@6.3.0",
  "definition" : "**Description:**Patient exhibits a severe reaction to the challenge agent.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationValue",
  "property" : [ {
    "code" : "status",
    "valueCode" : "active"
  }, {
    "code" : "internalId",
    "valueCode" : "22820"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_AllergyTestValue"
  } ],
  "codesystem" : "def60ac4-7f58-5ca1-a546-505bdbdb22b6",
  "concept_id" : "515857f5-9a27-5f5d-a025-43fdea284c7e",
  "ancestors" : {
    "A4" : 0,
    "_AllergyTestValue" : 1
  },
  "id" : "c0e394b6-359f-406c-ad83-e8a16c823a0c",
  "code" : "A4",
  "display" : "severe reaction",
  "version" : "4.0.0"
}