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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 Javascipt 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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Measure Authoring Tool version 5.9.0 Released

May 6, 2020

The MAT integrated with HARP on May 6th.

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The MAT is transitioning to HARP on May 6th, 2020!

May 6, 2020

In order to retain your access to the MAT after

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Helpful Video on HARP Registration

Apr 20, 2020

Next month, the MAT will be transitioning the user identity p

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