NHS North West Genomics
2.2.0 - ci-build
NHS North West Genomics
2.2.0 - ci-build
NHS North West Genomics - Local Development build (v2.2.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
| Official URL: https://fhir.nwgenomics.nhs.uk/CodeSystem/Histotrac | Version: 2.2.0 | ||||
| Active as of 2026-09-04 | Computable Name: Histotrac | ||||
Local test-order codes from Histotrac, the Histocompatibility and
Immunogenetics LIMS - see Histocompatibility and
Immunogenetics, HLA Tests -
Transplant Ask At Order Entry
and Chimerism Test Additional Ask At Order Entry
Questions. Sourced as HL7
v2 CE (coded element)-style code^text^codingSystem strings, both from the
HISTOTRACEAP coding system:
XTRANSPX_HLAAS^HLA ANTIBODY SCREENING^HISTOTRACEAPCHIMBTP^CHIMERISM TESTING - PERFORMABLE^HISTOTRACEAPThese are the raw LIMS test-order codes, distinct from the local NWGMSA
answer options (e.g. HLAAntibodyScreening, ChimerismPeripheralBlood)
used on the Ask At Order Entry Questionnaires' own order-entry choice
items - those model the order-entry UI selection, these are what Histotrac
itself calls the resulting order.
This Code system is referenced in the definition of the following value sets:
Properties
This code system defines the following properties for its concepts
| Name | Code | URI | Type | Description |
| category | category | https://fhir.nhs.uk/CodeSystem/England-GenomicTestDirectory#category | code | 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 |
Concepts
This case-sensitive code system https://fhir.nwgenomics.nhs.uk/CodeSystem/Histotrac provides a fragment that includes following codes:
| Code | Display | category |
| XTRANSPX_HLAAS | HLA ANTIBODY SCREENING | histocompatibility-immunogenetics |
| CHIMBTP | CHIMERISM TESTING - PERFORMABLE | chimerism |