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National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2022 NOVEMBER–DECEMBER No. 449

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RxNorm November 2022 Release

RxNorm November 2022 Release. NLM Tech Bull. 2022 Nov-Dec;(449):b5.

2022 November 07 [posted]

The RxNorm November 2022 monthly release became available on Monday, November 7, 2022.


No major changes to report for the RxNorm November 2022 release.


Download any RxNorm, SNOMED CT, or UMLS Release using a Single Command

A new application programming interface (API) endpoint is available for automating downloads of RxNorm, SNOMED CT, and Unified Medical Language System (UMLS) release files. Simply provide the URL and your API key.

  • The base URI is

Here are examples to download RxNorm Weekly Updates:

curl example:
curl "" -o

For more information, see the UMLS API Technical Documentation page.

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