The UMLS Terminology Services (UTS) is available at https://uts.nlm.nih.gov. The UTS, which replaced the UMLSKS as of January 31, 2011, includes a new license request interface and incorporates the browsing and API features of the UMLSKS. To retain access to UMLS-related applications and UMLS resources, you will need to enter into a new UMLS Metathesaurus License Agreement with NLM.
For instructions on requesting a license and accessing the UTS, see How to License and Access the Unified Medical Language System® (UMLS®) Data. License requests must be submitted through the new UTS interface. After NLM approves your license request, your UTS account is established.