{
  "package" : "hl7.terminology.r4@6.3.0",
  "definition" : "**Description:**Patient exhibits no reaction to the challenge agent.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationValue",
  "property" : [ {
    "code" : "status",
    "valueCode" : "active"
  }, {
    "code" : "internalId",
    "valueCode" : "22816"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_AllergyTestValue"
  } ],
  "codesystem" : "730c6680-1192-583b-885c-ffeb9abd3fa3",
  "concept_id" : "56f76857-5393-514d-9fbb-1f5c37ce9cf1",
  "ancestors" : {
    "A0" : 0,
    "_AllergyTestValue" : 1
  },
  "id" : "2d28ab4d-95b6-4bec-b83b-560a2e52df78",
  "code" : "A0",
  "display" : "no reaction",
  "version" : "4.0.0"
}