<status value="active"/> <experimental value="false"/> <date value="2026-09-04"/> <publisher value="NHS North West Genomics"/> <contact> <telecom> <system value="url"/> <value value="https://www.nwgenomics.nhs.uk/contact-us"/> </telecom> </contact> <description value="Local test-order codes from **Histotrac**, the Histocompatibility and Immunogenetics LIMS - see [Histocompatibility and Immunogenetics](HistocompatibilityAndImmunogenetics.html), [HLA Tests - Transplant Ask At Order Entry](Questionnaire-HLATestsTransplantAskAtOrderEntry.html) and [Chimerism Test Additional Ask At Order Entry Questions](Questionnaire-ChimerismTestAdditionalAskAtOrderQuestions.html). Sourced as HL7 v2 CE (coded element)-style `code^text^codingSystem` strings, both from the `HISTOTRACEAP` coding system: - `XTRANSPX_HLAAS^HLA ANTIBODY SCREENING^HISTOTRACEAP` - `CHIMBTP^CHIMERISM TESTING - PERFORMABLE^HISTOTRACEAP` These 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."/> <jurisdiction> <coding> <system value="urn:iso:std:iso:3166"/> <code value="GB"/> <display value="United Kingdom of Great Britain and Northern Ireland"/> </coding> </jurisdiction> <caseSensitive value="true"/> <content value="fragment"/> <property> <code value="category"/> <uri value="https://fhir.nhs.uk/CodeSystem/England-GenomicTestDirectory#category"/> <description value="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 value="code"/> </property> <concept> <code value="XTRANSPX_HLAAS"/> <display value="HLA ANTIBODY SCREENING"/> <property> <code value="category"/> <valueCode value="histocompatibility-immunogenetics"/> </property> </concept> <concept> <code value="CHIMBTP"/> <display value="CHIMERISM TESTING - PERFORMABLE"/> <property> <code value="category"/> <valueCode value="chimerism"/> </property> </concept> </CodeSystem>

Generated Narrative: CodeSystem Histotrac

Properties

This code system defines the following properties for its concepts

Name

Code

URI

Type

Description

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