Local order-detail 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.

Unlike the Test Code carried in OBR-4/ServiceRequest.code (a $DGTS Genomic/Genetic Test (GT) code, or a local NWTestCode code for test families with no national code), these concepts model the Patient Test(s) order-detail restatement seen in the live Histotrac ORM^O01/OML^O21 orders - the value Histotrac itself carries alongside the Test Code to say which specific lineage/panel or transplant test was ordered. Bound to ServiceRequest.orderDetail via HistotracOrderDetail - see GenomicTestCodes for the separate ServiceRequest.code binding these relate to via the relatedTestCode property below.

Sourced as HL7 v2 CE (coded element)-style code^text^codingSystem strings from the HISTOTRACEAP coding system - see each concept's worked example (HLA Tests - Transplant, Chimerism Testing). These are 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.

Properties

This code system defines the following properties for its concepts

Concepts

This case-sensitive code system https://fhir.nwgenomics.nhs.uk/CodeSystem/Histotrac provides a fragment that includes following codes: