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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

April Release - 04/06/2015

This release of RxNorm is consistent with the 2014AB UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm technical documentation.


The following sources have been updated since the previous RxNorm release:

Source NameSABDate Updated
Gold Standard Drug Database GS 03/04/2015
Medi-Span Master Drug Data Base MDDB 03/04/2015
Multum MediSource Lexicon MMSL 03/01/2015
Micromedex RED BOOK MMX 03/02/2015
FDA Structured Product Labels MTHSPL 03/25/2015
FDB MedKnowledge (formerly NDDF Plus) NDDF 03/11/2015
Veterans Health Administration National Drug File - Reference Terminology NDFRT 04/06/2015
NDFRT FDASPL relationships NDFRT_FDASPL 04/06/2015
NDFRT FMTSME relationships NDFRT_FMTSME 04/06/2015
Veterans Health Administration National Drug File VANDF 02/19/2015


The following sources have not been updated in this release:

Source NameSABDate Updated
Anatomical Therapeutic Chemical Classification System ATC 2015
Medical Subject Headings (MeSH) MSH 09/08/2014
CMS Formulary Reference File MTHCMSFRF 2014
FDA National Drug Code Directory MTHFDA 06/01/2011
US Edition of SNOMED CT (drug information) SNOMEDCT_US 01/31/2015


Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCKs 374
Active BPCKs 430
Active SCDs 20066
Active SBDs 10625
Active RXNORM MINs 3948
Active RXNORM INs 10475
Active RXNORM PINs 2408
Active RXNORM BNs 6458
Active RXNORM DFs 103
Obsolete GPCKs 125
Obsolete BPCKs 109
Obsolete SCDs 14600
Obsolete SBDs 9842
Obsolete RXNORM MINs 0
Obsolete RXNORM INs 0
Obsolete RXNORM PINs 0
Obsolete RXNORM BNs 9147
Obsolete RXNORM DFs 57
Editor-suppressed SCDs 1150
Editor-suppressed SBDs 990
OCD atoms 335180
Source-asserted NDCs 1345168
Distinct source-asserted NDCs 609503
Distinct SAB=RXNORM NDCs 204937

Last Reviewed: April 6, 2015