Skip Navigation Bar
NLM logo

Unified Medical Language System® (UMLS®)

RxNorm Release Notes

May Release - 05/06/2013

This release of RxNorm is consistent with the 2013AA 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 04/04/2013
Medi-Span Master Drug Data Base MDDB 04/03/2013
Multum MediSource Lexicon MMSL 04/01/2013
Micromedex RED BOOK MMX 04/01/2013
Medical Subject Headings (MeSH) MSH 01/21/2013
FDA Structured Product Labels MTHSPL 04/30/2013
FDB MedKnowledge (formerly NDDF Plus) NDDF 04/10/2013
Veterans Health Administration National Drug File - Reference Terminology NDFRT 05/06/2013
Veterans Health Administration National Drug File VANDF 03/29/2013


The following sources have not been updated in this release:

Source NameSABDate Updated
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2013

Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 328
Active BPCK forms 397
Active SCD forms 19,951
Active SBD forms 10,894
Active RXNORM MIN atoms 3,827
Active RXNORM IN atoms 8,511
Active RXNORM PIN atoms 2,052
Active RXNORM BN atoms 6,823
Active RXNORM DF atoms 104
Obsolete GPCK forms 114
Obsolete BPCK forms 92
Obsolete SCD forms 13,752
Obsolete SBD forms 9,556
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 8,699
Obsolete RXNORM DF atoms 51
Editor-suppressed SCD forms 1,080
Editor-suppressed SBD forms 898
OCD atoms 309,638
Source-asserted NDC codes 1,228,893
Distinct Source-asserted NDC codes 550,655
SAB=RXNORM NDC codes 193,626
Distinct SAB=RXNORM NDC codes 193,626

Last Reviewed: May 6, 2013