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Unified Medical Language System® (UMLS®)

2015AA UMLS UMDNS Source Information

Web site:

The Universal Medical Device Nomenclature System (UMDNS) is a standard worldwide nomenclature for medical devices that has been officially adopted by many nations. It is produced by the ECRI Institute.

UMDNS is a standard international nomenclature and computer coding system for medical devices. The purpose of UMDNS is to facilitate the identifying, processing, filing, storing, retrieving, transferring, and communicating of data about medical devices.

UMDNS contains nearly 7,500 preferred terms and 8,000 entry terms. UMDNS defines explicit hierarchical and synonymous relationships among these terms.

UMDNS is also available in Spanish from the ECRI Institute.

UMDNS is used in applications for hospital inventory control, work order control, and medical device regulatory systems.

Update Frequency
UMDNS is updated annually.

Metathesaurus Update Frequency
UMDNS is updated annually in the Metathesaurus.

Sites Consulted

  1. ECRI Institute [Internet]. ECRI Institute; c2009. Universal Medical Device Nomenclature System; [cited 2009 May 07]. Available from: