Unified Medical Language System® (UMLS®)
Contact UMLS Support:
Contact Value Set Authority Center Support:
Contact RxNorm Support:
Contact RxNav Support:
Contact SNOMED CT Support:
UMLS Users Listserv (UMLSUSERS-L):
UMLS users are encouraged to subscribe to this list, to share their experiences with, or seek advice from the UMLS community on using UMLS resources. NLM also uses this forum to distribute official announcements about UMLS products and services.
- To subscribe, send an e-mail to: firstname.lastname@example.org containing the following message: SUBSCRIBE UMLSUSERS-L <your full name>
- To post a message to the list AFTER subscribing, send an e-mail to: UMLSUSERS-L@list.nih.gov
- To access subscription information and list archives, go to: UMLSUSERS-L Listserv Web page
RxNorm Announcements Listserv (RXNORM-ANNOUNCES-L):
Announcement-only list about major changes to the RxNorm release files, technical issues related to accessing the files, and other important announcements.
- To subscribe, send an e-mail to: email@example.com containing the following message: SUBSCRIBE RXNORM-ANNOUNCES-L <your full name>
- To access subscription information and list archives, go to: RXNORM-ANNOUNCES-L Listserv Web page
VSAC Announcements Listserv (NLM_VSAC_UPDATES):
Announcement-only list about new releases and other communications related to the activities of the Value Set Authority Center (VSAC).