{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0518",
  "property" : [ ],
  "codesystem" : "7ef51c75-5883-570f-8f27-f3eed81748d4",
  "concept_id" : "d53ee1f3-4495-5b88-a2c4-4d1cfce26d5c",
  "ancestors" : {
    "EXTN" : 0
  },
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
    "valueString" : "Identifies an override where a service is being performed for longer than the ordered period of time."
  } ],
  "id" : "012268f8-4739-4374-a6b1-eaf361dbbe95",
  "code" : "EXTN",
  "display" : "Extension Override",
  "version" : "2.9"
}