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Academics/Researchers

Unified Medical Language System® (UMLS®)

eCQM Tool -
(Last updated: Dec 10, 2025)
The Unified Medical Language System® (UMLS®) is a set of files and software bringing together health and biomedical vocabularies and standards to enable interoperability between computer systems. The UMLS integrates and distributes key terminology, classification and coding standards, and…

Updated eCQM Specifications and Implementation Resources for 2026 Reporting/Performance Period

News -
(Last updated: Dec 10, 2025)
The Centers for Medicare & Medicaid Services (CMS) has posted the electronic clinical quality measure (eCQM) specifications for the 2026 reporting/performance period for hospital inpatient, hospital outpatient, and eligible clinician quality reporting programs. CMS updates the specifications…

Value Set Authority Center (VSAC)

eCQM Tool -
(Last updated: Dec 10, 2025)
The Value Set Authority Center (VSAC) is a value set authoring tool and repository. It is the source of truth for value sets for CMS's electronic clinical quality measures. The National Library of Medicine maintains the VSAC and provides access via web browsers and APIs. The VSAC provides…

Value Set Authority Center (VSAC) Collaboration

Engagement Opportunity -
(Last updated: Jan 02, 2025)
Provides a central site where value set authors can post value sets for collaborative discussion. In that site, teams can share threaded discussions about the value sets, view recent value set expansions posted by site members, organize their value sets.

VSAC SVS API

eCQM Tool -
(Last updated: Feb 04, 2026)
The Value Set Authority Center (VSAC) Sharing Value Set (SVS) Application Programming Interface (API) allows the user to retrieve a single value set's expansion, with or without its metadata and definition version, using RetrieveMultipleValueSets and RetrieveValueSet, respectively. It is based on…
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