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The Centers for Medicare & Medicaid Services

MAT & all Bonnies Have Been Decomissioned as of June 28, 2024

The Measure Authoring Tool (MAT) and all Bonnies have been replaced by the Measure Authoring Development Integrated Environment (MADiE) as of June 28, 2024.

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To log in to MADiE, a user account is required. If you are unable to log in to your MADiE account, please contact the 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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MADiE User Group

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The MADiE User Group is an op

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MAT and Bonnie Migration – Action Needed

Mar 8, 2024

Important announcement from CMS: MAT and Bonnie decommissioning date finalized - June 28, 2024. 
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The MAT and Bonnie User Group is an open forum to discuss the status of the tools and gather comm

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