{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0445",
  "property" : [ ],
  "codesystem" : "6e39093f-2be7-5442-8038-c0300fd3eb79",
  "concept_id" : "2acaedb7-54f4-545c-8e2b-79b3528b4906",
  "ancestors" : {
    "UD" : 0
  },
  "id" : "21935dc0-0707-4c67-9df7-c8d168b1327f",
  "code" : "UD",
  "display" : "Unknown/Default Date of Birth",
  "version" : "2.9"
}