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: Histotrac Test Codes

Active as of 2026-09-04

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{
  "resourceType" : "CodeSystem",
  "id" : "Histotrac",
  "language" : "en",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem Histotrac</b></p><a name=\"Histotrac\"> </a><a name=\"hcHistotrac\"> </a><p><b>Properties</b></p><p><b>This code system defines the following properties for its concepts</b></p><table class=\"grid\"><tr><td><b>Name</b></td><td><b>Code</b></td><td><b>URI</b></td><td><b>Type</b></td><td><b>Description</b></td></tr><tr><td>category</td><td>category</td><td>https://fhir.nhs.uk/CodeSystem/England-GenomicTestDirectory#category</td><td>code</td><td>Which part of the National Genomic Test Directory this code belongs to - reuses the same category values as CodeSystem-GenomicTestCode/CodeSystem-DigitalGenomicTestServices, plus histocompatibility-immunogenetics for codes outside that scheme</td></tr></table><p><b>Concepts</b></p><p>This case-sensitive code system <code>https://fhir.nwgenomics.nhs.uk/CodeSystem/Histotrac</code> provides <b>a fragment</b> that includes following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>category</b></td></tr><tr><td style=\"white-space:nowrap\">XTRANSPX_HLAAS<a name=\"Histotrac-XTRANSPX_HLAAS\"> </a></td><td>HLA ANTIBODY SCREENING</td><td>histocompatibility-immunogenetics</td></tr><tr><td style=\"white-space:nowrap\">CHIMBTP<a name=\"Histotrac-CHIMBTP\"> </a></td><td>CHIMERISM TESTING - PERFORMABLE</td><td>chimerism</td></tr></table></div>"
  },
  "url" : "https://fhir.nwgenomics.nhs.uk/CodeSystem/Histotrac",
  "version" : "2.2.0",
  "name" : "Histotrac",
  "title" : "Histotrac Test Codes",
  "status" : "active",
  "experimental" : false,
  "date" : "2026-09-04",
  "publisher" : "NHS North West Genomics",
  "contact" : [
    {
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://www.nwgenomics.nhs.uk/contact-us"
        }
      ]
    }
  ],
  "description" : "Local test-order codes from **Histotrac**, the Histocompatibility and\nImmunogenetics LIMS - see [Histocompatibility and\nImmunogenetics](HistocompatibilityAndImmunogenetics.html), [HLA Tests -\nTransplant Ask At Order Entry](Questionnaire-HLATestsTransplantAskAtOrderEntry.html)\nand [Chimerism Test Additional Ask At Order Entry\nQuestions](Questionnaire-ChimerismTestAdditionalAskAtOrderQuestions.html). Sourced as HL7\nv2 CE (coded element)-style `code^text^codingSystem` strings, both from the\n`HISTOTRACEAP` coding system:\n\n- `XTRANSPX_HLAAS^HLA ANTIBODY SCREENING^HISTOTRACEAP`\n- `CHIMBTP^CHIMERISM TESTING - PERFORMABLE^HISTOTRACEAP`\n\nThese are the raw LIMS test-order codes, distinct from the local `NWGMSA`\nanswer options (e.g. `HLAAntibodyScreening`, `ChimerismPeripheralBlood`)\nused on the Ask At Order Entry Questionnaires' own order-entry choice\nitems - those model the order-entry UI selection, these are what Histotrac\nitself calls the resulting order.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "urn:iso:std:iso:3166",
          "code" : "GB",
          "display" : "United Kingdom of Great Britain and Northern Ireland"
        }
      ]
    }
  ],
  "caseSensitive" : true,
  "content" : "fragment",
  "property" : [
    {
      "code" : "category",
      "uri" : "https://fhir.nhs.uk/CodeSystem/England-GenomicTestDirectory#category",
      "description" : "Which part of the National Genomic Test Directory this code belongs to - reuses the same category values as CodeSystem-GenomicTestCode/CodeSystem-DigitalGenomicTestServices, plus histocompatibility-immunogenetics for codes outside that scheme",
      "type" : "code"
    }
  ],
  "concept" : [
    {
      "code" : "XTRANSPX_HLAAS",
      "display" : "HLA ANTIBODY SCREENING",
      "property" : [
        {
          "code" : "category",
          "valueCode" : "histocompatibility-immunogenetics"
        }
      ]
    },
    {
      "code" : "CHIMBTP",
      "display" : "CHIMERISM TESTING - PERFORMABLE",
      "property" : [
        {
          "code" : "category",
          "valueCode" : "chimerism"
        }
      ]
    }
  ]
}