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.

Value set expansion

A value set expansion is the list of codes, calculated using a specified expansion profile of code system versions and any predetermined retired (legacy) codes used with implementation of the value set.

Last Updated: Dec 04, 2025

We want your feedback

For technical questions about eCQMs, please log in to the ONC Project Tracking System, specifically the eCQM Issue Tracker.

eCQI Resource Center Feedback pertains to:
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.