{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Known to have no proper value (e.g., last menstrual period for a male).",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-NullFlavor",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "NI"
  } ],
  "codesystem" : "6f819d30-3400-5f76-8b7a-ac265f94fe3b",
  "concept_id" : "d9af3604-5bf8-5fd6-a39b-e689bbe4beb2",
  "ancestors" : {
    "NA" : 0,
    "NI" : 1
  },
  "id" : "c8472ab7-1c07-4ba5-95eb-0c53d1e6d069",
  "code" : "NA",
  "display" : "not applicable",
  "version" : "2018-08-12"
}