{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0376",
  "property" : [ ],
  "codesystem" : "9a4bc233-0dfa-5d5b-8e6e-db413dc9b25a",
  "concept_id" : "2b2454ab-b6e8-563e-bb0a-1d51befd965c",
  "ancestors" : {
    "CFRZ" : 0
  },
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
    "valueString" : "Critical frozen - must not be allowed to thaw until immediately prior to testing"
  } ],
  "id" : "d1e18fd1-6947-49bc-bd08-91883afb0627",
  "code" : "CFRZ",
  "display" : "Critical frozen temperature",
  "version" : "2.9"
}