Medical Entities Dictionary (MED) was developed and is maintained by the Columbia Presbyterian Medical Center and Columbia University.
MED serves as a set of standard terms to represent and capture clinical data in electronic health records (EHR) systems.
MED is organized as a polyhierarchical semantic network of medical entities. It contains over 100,000 terms from a variety of sources, including the UMLS Metathesaurus, ICD-9-CM, and LOINC.
The Metathesaurus representation of MED includes only 3,000 MED terms. These terms are arranged polyhierarchically into seven groupings. The seven entity groupings are
MED is used by clinicians, nurses, and other health professionals.
Metathesaurus Update Frequency
MED was last updated in the Metathesaurus in 2003.