News & Alerts

Downtime Notification - Measure Authoring Tool (MAT) for the release of MAT version 5.4

The Measure Authoring Tool (MAT) will be unavailable from approximately Thursday, November 9, 2017 at 7:00am ET through Sunday, November 12, 2017 at 7:00pm ET, due to the release of the MAT version 5.4 which includes the implementation of Clinical Quality Language (CQL), and regularly scheduled system maintenance. A notice will be sent to all active users once the system is back up and running.

For additional information on the transition to using CQL as the language for expressing Electronic Clinical Quality Measures (eCQMs), please visit

If you have any questions, please contact the Measure Authoring Tool support desk by completing the 'Contact Us' form located on the Contact Us page of the MAT public webste( or by calling 1-800-673-0655 M-F 7:30am-5:00pm Central Time.