{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "This information has not been sought (e.g., patient was not asked)",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-NullFlavor",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "UNK"
  } ],
  "codesystem" : "6f819d30-3400-5f76-8b7a-ac265f94fe3b",
  "concept_id" : "2baaa2c9-5414-5665-887e-d2633fee6d84",
  "ancestors" : {
    "NI" : 2,
    "UNK" : 1,
    "NASK" : 0
  },
  "id" : "3a574126-1e42-4e46-a2c0-d8b5b72f5ba3",
  "code" : "NASK",
  "display" : "not asked",
  "version" : "2018-08-12"
}