Release 4 5 Preview #2
This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU ). This is the current published version in it's permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions
Vocabulary Work Group Maturity Level : 2 Standards Status : Trial Use
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 " " 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 FHIR 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 SNOMED CT 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.