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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

April Release - 04/04/2016

This release of RxNorm is consistent with the 2015AB 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 03/08/2016
Medi-Span Master Drug Data Base MDDB 03/02/2016
Multum MediSource Lexicon MMSL 03/01/2016
Micromedex RED BOOK MMX 03/07/2016
FDA Structured Product Labels MTHSPL 03/25/2016
FDB MedKnowledge (formerly NDDF Plus) NDDF 03/09/2016
Veterans Health Administration National Drug File - Reference Terminology NDFRT 04/04/2016
NDFRT FDASPL relationships NDFRT_FDASPL 04/04/2016
NDFRT FMTSME relationships NDFRT_FMTSME 04/04/2016
Veterans Health Administration National Drug File VANDF 02/25/2016


The following sources have not been updated in this release:

Source NameSABDate Updated
Anatomical Therapeutic Chemical Classification System ATC 2016
Medical Subject Headings (MeSH) MSH 08/18/2015
CMS Formulary Reference File MTHCMSFRF 2014
US Edition of SNOMED CT (drug information) SNOMEDCT_US 01/31/2016

Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCKs369
Active BPCKs412
Active SCDs18787
Active SBDs10676
Active RXNORM MINs3992
Active RXNORM INs10906
Active RXNORM PINs2531
Active RXNORM BNs6393
Active RXNORM DFs114
Obsolete GPCKs140
Obsolete BPCKs128
Obsolete SCDs16248
Obsolete SBDs10094
Obsolete RXNORM MINs0
Obsolete RXNORM INs0
Obsolete RXNORM PINs0
Obsolete RXNORM BNs9456
Obsolete RXNORM DFs54
Editor-suppressed SCDs1486
Editor-suppressed SBDs1306
Source-asserted NDCs1188312
Distinct source-asserted NDCs559035
Distinct SAB=RXNORM NDCs212612

Last Reviewed: April 4, 2016