Contact UMLS, Value Set Authority Center, or SNOMED CT Support:
Contact RxNorm Support:
Contact RxNav Support:
UMLS Users Listserv (UMLSUSERS-L):
NLM uses this forum to distribute official announcements about UMLS products and services.
- To subscribe, send an e-mail to: listserv@list.nih.gov containing the following message: SUBSCRIBE UMLSUSERS-L <your full name>
- To access subscription information and list archives or to unsubscribe, 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: listserv@list.nih.gov containing the following message: SUBSCRIBE RXNORM-ANNOUNCES-L <your full name>
- To access subscription information and list archives or to unsubscribe, 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).
- To subscribe, send an e-mail to: listserv@list.nih.gov containing the following message: SUBSCRIBE NLM_VSAC_UPDATES <your full name>
- To access subscription information and list archives or to unsubscribe, go to: NLM_VSAC_UPDATES Listserv Web page
SNOMED CT Announcements Listserv (SNOMEDCT-ANNOUNCES-L):
Announcement-only list about major changes to the SNOMED CT release files, technical issues related to accessing the files, and other important announcements.
- To subscribe, send an e-mail to: listserv@list.nih.gov containing the following message: SUBSCRIBE SNOMEDCT-ANNOUNCES-L <your full name>
- To access subscription information and list archives or to unsubscribe, go to: SNOMEDCT-ANNOUNCES-L Listserv Web page
Last Reviewed: February 24, 2025