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Unified Medical Language System (UMLS)

UMLS Vocabularies

NDFRT_FMTSME (National Drug File - FMTSME) - Synopsis

The National Drug File - Reference Terminology (NDFRT) - Federal Medication Terminologies Subject Matter Expert (FMTSME) relationships were developed by the Federal Medication (FedMed) interagency collaboration. FedMed is organizing an agreed set of standard, comprehensive, freely and easily accessible FMT to improve the exchange and public availability of medication information. The Veterans Health Administration (VHA) maintains the NDFRT-FMTSME relationships within NDFRT.

NDFRT-FMTSME relationships are used to associated NDFRT ingredients with NDFRT drug classes.

NDFRT-FMTSME is a set of relationships between NDFRT concepts. No source atoms are included.

Update Frequency
NDFRT-FMTSME is updated monthly.

Metathesaurus Update Frequency
NDFRT-FMTSME is updated in each Metathesaurus release as part of RxNorm.

Sites Consulted

  1. National Drug File – Reference Terminology (NDF-RT™) Documentation [Internet]. September 2014 version. [Washington]: U.S. Department of Veterans Affairs, Veterans Health Administration;; [cited 2014 Dec 04]; [22 p]. Available from:
  2. National Cancert Institute [Internet]. Bethesda, MD: :National Cancer Institute (US); [cited 2014 Dec 04]. Federal Medication Terminologies; [cited 2014 Dec 04]. Available from: