{
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  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0496",
  "property" : [ ],
  "codesystem" : "2e90a841-5ddc-5856-b7f4-ec5df030604f",
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  "ancestors" : {
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  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
    "valueString" : "Medical Treatment/ Procedure"
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  "id" : "a35569bf-91ce-4876-bdde-f25c68d5fdf5",
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  "display" : "AZT Therapy",
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}