{
  "package" : "us.nlm.vsac@0.21.0",
  "definition" : null,
  "system" : "https://www.cdc.gov/nhsn/cdaportal/terminology/codesystem/cdcnhsn.html",
  "property" : [ ],
  "codesystem" : "078444ba-7844-5424-a8ae-aaa5dd3908d0",
  "concept_id" : "ec815a34-0e45-561c-82ab-f7e9aa9d41e4",
  "ancestors" : {
    "1644-4" : 0
  },
  "id" : "f74cbb8e-0196-49af-87fd-de9fccd0915c",
  "code" : "1644-4",
  "display" : "Total number of admissions with a primary CPT code in this procedure category",
  "version" : "2023-04"
}