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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

March Release - 3/04/2019

This release of RxNorm is consistent with the 2018AB 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 with version names in bold have been updated since the previous RxNorm release:

Source NameSABVersion
Anatomical Therapeutic Chemical Classification System ATC ATC_2019
DrugBank DRUGBANK DRUGBANK5.0_2019_01_31
Gold Standard Drug Database GS GS_2019_02_05
Multum MediSource Lexicon MMSL MMSL_2019_02_01
Micromedex RED BOOK MMX MMX_2019_02_04
FDA Structured Product Labels MTHSPL MTHSPL_2019_02_22
FDB MedKnowledge (formerly NDDF Plus) NDDF NDDF_2019_01_30
RxNorm normalized names and codes RXNORM RXNORM_18AB_190304F
US Edition of SNOMED CT (drug information) SNOMEDCT_US SNOMEDCT_US_2019_01_31
Veterans Health Administration National Drug File VANDF VANDF_2019_02_01

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

Source NameSABVersion
Vaccines Administered CVX CVX_2018_10_18
Medical Subject Headings (MeSH) MSH MSH2019_2018_07_31
CMS Formulary Reference File MTHCMSFRF MTHCMSFRF_2014
USP Compendial Nomenclature USP USP_2018_12_10

*Reminder: As of October 2017, Medi-Span data will not be included in the RxNorm or UMLS releases. If you have questions about Medi-Span, please contact:

Data Changes

Eliminating Two Weekly Releases
RxNorm will be eliminating 2 weekly releases beginning in 2019. The May 1, 2019 and October 30, 2019 weekly releases will not be created in 2019. The two eliminated weekly releases will immediately precede the full May and November monthly releases moving forward. Please note that there will now be 50 RxNorm weekly releases instead of 52.

Data Counts

Term Type or AttributeNumber
Active GPCKs381
Active BPCKs476
Active SCDs18305
Active SBDs10330
Active RXNORM MINs3818
Active RXNORM INs12174
Active RXNORM PINs2840
Active RXNORM BNs5892
Active RXNORM DFs117
Obsolete GPCKs196
Obsolete BPCKs162
Obsolete SCDs16689
Obsolete SBDs10968
Obsolete RXNORM MINs0
Obsolete RXNORM INs0
Obsolete RXNORM PINs0
Obsolete RXNORM BNs6265
Obsolete RXNORM DFs61
Editor-suppressed SCDs1744
Editor-suppressed SBDs1452
Distinct SAB=RXNORM NDCs252456

Last Reviewed: March 4, 2019