Back to top
Top
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Development

Synthea™

eCQM Tool -
(Last updated: Mar 13, 2025)
Synthea™ is an open-source, synthetic patient generator that models the medical history of synthetic patients. It provides realistic, but not real, patient data and associated health records covering every aspect of health care. The resulting data is free from cost, privacy, and security…

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…

US Core

eCQM Tool -
(Last updated: Dec 09, 2025)
US Core is a set of rules and best practices that help healthcare providers share patient information safely and efficiently across the United States. It uses the FHIR standard to align how data—such as patient records, medications, and lab results—is formatted and exchanged. These rules follow…

USCDI+ Quality Data Element List

eCQM Tool -
(Last updated: Mar 11, 2026)
The United States Core Data for Interoperability (USCDI) + Quality Data Element List is a standardized set of health data classes and constituent data elements for nationwide, interoperable health information exchange.

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…

VSAC Support Center

eCQM Tool -
(Last updated: Dec 10, 2025)
The VSAC Support Center is the Help section of the Value Set Authority Center website. It provides information on how to use the VSAC, specific information for value set authors and stewards (e.g., how to create value sets), and additional information such as release notes and how to use the VSAC…
Subscribe to Associated with <strong>Development</strong>