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The Centers for Medicare & Medicaid Services

New MAT User Request

Use this form to request a new Measure Authoring Tool (MAT) user to be created.

You must already have a valid HARP ID. If you do not already have a HARP ID, you can register for one at Your request will be sent to the MAT help desk for approval. You will be notified when your new MAT user is created.

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The MAT and all Bonnies will no longer be accessible after June 28, 2024.  Please read this announcement from CMS for more details.