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The Centers for Medicare & Medicaid Services

Measure Authoring Tool

The Measure Authoring Tool (MAT) is a web-based tool that allows measure developers to author electronic Clinical Quality Measures (eCQMs).

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To log in to the MAT, a user account is required. If you are unable to log in to your MAT account, please contact the MAT Support desk.

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Measure Authoring Tool Overview

Using the tool, authors create Clinical Quality Language (CQL) expressions, which have the conceptual portion of the Quality Data Model (QDM) as their foundation.

The tool provides the capability to express complex measure logic and export measures in several formats, including a human-readable document that can be viewed in a web browser, an eCQM HQMF XML document which provides metadata, terminology, data elements and specific population definitions respective to the measure, a CQL file which contains the terminology and expression logic used by the measure, an ELM XML export that is a computer-readable XML version of the CQL file, and a Javascript Object Notation (JSON) export which is a serialized format of the ELM file. The data expressed in the tool by the users serves as the input for the creation of the defined export files.

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Latest News & Alerts

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MAT and Bonnie User Group

Apr 28, 2022

The MAT and Bonnie User Group is an open forum to discuss the status of the tools and gather comm

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MAT Version 6.10

Jun 16, 2021

The Measure Authoring Tool 6.10 has been successfully released.  Please see the Training & Re

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Bonnie 6.1.2 FHIR Training Video Series

Apr 16, 2021

The Bonnie version 6.1.2 FHIR allows users to test Fast Healt

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