HL7 Terminology (THO)
5.2.0 - Publication
HL7 Terminology (THO)
5.2.0 - Publication
This page is part of the HL7 Terminology (v5.2.0: Release) based on FHIR R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions 
This page describes how to use LOINC with HL7 Standards.
IMPORTANT NOTE:As of UMLS v17AB, NDF-RT is no longer being maintained and has been replaced by the Medication Reference Terminology (MED-RT). Further documentation on MED-RT can be found in evs.
| Source | the National Drug File - Reference Terminology - prepared by Veterans Health Administration, and distributed as part of UMLS by the NLM (direct link) |
| System | The URI to identify NDF-RT is not resolved. As a temporary arrangement, the URL "http://hl7.org/fhir/ndfrt" is to be used |
| Version | A version is not needed. (Use the date of the UMLS release for the version of NDF-RT if a version is desired.) |
| Code | The NUI is used for the code value for an NDF-RT concept |
| Display | ?? |
| Inactive | Todo: Describe how it is determined which concepts are inactive |
| Subsumption | Subsumption testing is based in the Is-a relationship defined by NDFRT |
| Filter Properties | None are described yet |
This URL is temporary while the NDF-RT and HL7 teams discuss the long term arrangements. Further documentation can be found in evs.
NDF-RT is released as part of UMLS. Therefore, each successive release has the date of the UMLS release as its version.
NDF-RT has no copyright acknowledgement required. However, users must adhere to the UMLS license.
This section documents the property filters that can be used with the NDF-RT code system in value set composition statements.
| Description | Select a set of concepts based on subsumption testing |
| Property Name | concept |
| Operations Allowed | is-a |
| Values Allowed | NUI |
| Comments | Includes all concepts that have a transitive is-a relationship with the concept Id provided in the value as an NUI (including the concept itself) |
Others yet to be done.
Yet to be done.
IG © 2020+ HL7 International - Vocabulary Work Group. Package hl7.terminology#5.2.0 based on FHIR 4.0.1. Generated 2023-07-17
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