HL7 Terminology (THO), published by HL7 International - Vocabulary Work Group. This guide is not an authorized publication; it is the continuous build for version 5.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/UTG/ and changes regularly. See the Directory of published versions

• Narrative Content
• XML
• JSON
• TTL
• History

NamingSystem:

Official URL: http://terminology.hl7.org/NamingSystem/MEDRT				Version: 1.0.0
Active as of 2022-02-16			Responsible: National Cancer Institute (NCI) Enterprise Vocabulary Services (EVS)	Computable Name: MEDRT

Medication Reference Terminology (MED-RT) is the evolutionary successor to the Veterans Health Administration National Drug File – Reference Terminology (VHA NDF-RT). Both are formal ontology representations of medication terminology, pharmacologic classifications, and asserted authoritative relationships between them.

The MED-RT code system includes relationships between MED-RT concepts and concepts in external code systems, as well as relationships between concepts only in the external code systems. The external code systems that MED-RT references include RxNorm, MeSH, and SNOMED CT US Edition.

MED-RT can be downloaded from https://evs.nci.nih.gov/ftp1/MED-RT/

For more information, please see https://ncit.nci.nih.gov/ncitbrowser/pages/vocabulary.jsf?dictionary=MED-RT