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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

February Release - 02/01/2010

This release of RxNorm is consistent with the 2009AB UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm Documentation.


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

Source NameSABDate Updated
Gold Standard Alchemy GS 01/03/2010
Medi-Span Master Drug Data Base MDDB 01/06/2010
Multum MediSource Lexicon MMSL 01/01/2010
Micromedex DRUGDEX MMX 01/04/2010
FDA National Drug Code Directory MTHFDA 01/04/2010
FDA Structured Product Labels MTHSPL 01/25/2010
First DataBank NDDF Plus Source Vocabulary NDDF 01/08/2010
Veterans Health Administration National Drug File VANDF 01/04/2010

The following sources have not been updated since the previous RxNorm release:

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/17/2009
SNOMED Clinical Terms (drug information) SNOMED CT 07/31/2009

Data Changes

There are no significant data changes for this release. 

Data Counts

Term Type or AttributeNumber
Active GPCK forms 276
Active BPCK forms 347
Active SCD forms 18,505
Active SBD forms 15,433
Active RXNORM IN atoms 4,656
Active RXNORM PIN atoms 1,517
Active RXNORM BN atoms 13,524
Active RXNORM DF atoms 100
Obsolete GPCK forms 32
Obsolete BPCK forms 14
Obsolete SCD forms 12,401
Obsolete SBD forms 4,011
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 55
OCD atoms 256,614
Source-asserted NDC codes 541,081
Distinct Source-asserted NDC codes 336,273
SAB=RXNORM NDC codes 279,432
Distinct SAB=RXNORM NDC codes 279,432

Last Reviewed: February 7, 2011