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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

February Release - 02/03/2014

This release of RxNorm is consistent with the 2013AB 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
Anatomical Therapeutic Chemical Classification System ATC 2014
Gold Standard Drug Database GS 01/06/2014
Medi-Span Master Drug Data Base MDDB 01/01/2014
Multum MediSource Lexicon MMSL 01/02/2014
Micromedex RED BOOK MMX 01/06/2014
FDA Structured Product Labels MTHSPL 01/27/2014
FDB MedKnowledge (formerly NDDF Plus) NDDF 01/08/2014
Veterans Health Administration National Drug File - Reference Terminology NDFRT 02/03/2014
Veterans Health Administration National Drug File VANDF 12/20/2013


The following sources have not been updated in this release:

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/19/2013
FDA National Drug Code Directory MTHFDA 06/01/2011
US Edition of SNOMED CT (drug information) SNOMEDCT_US 07/31/2013

Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 333
Active BPCK forms 414
Active SCD forms 20,268
Active SBD forms 10,708
Active RXNORM MIN atoms 3,877
Active RXNORM IN atoms 9,540
Active RXNORM PIN atoms 2,236
Active RXNORM BN atoms 6,693
Active RXNORM DF atoms 105
Obsolete GPCK forms 128
Obsolete BPCK forms 108
Obsolete SCD forms 13,873
Obsolete SBD forms 10,283
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 9,261
Obsolete RXNORM DF atoms 51
Editor-suppressed SCD forms 1,124
Editor-suppressed SBD forms 908
OCD atoms 326,332
Source-asserted NDC codes 1,274,977
Distinct Source-asserted NDC codes 574,811
SAB=RXNORM NDC codes 196,853
Distinct SAB=RXNORM NDC codes 196,853

Last Reviewed: February 3, 2014