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Who are the MACs

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Current Maps and Lists

To find out who the current A/B and DME MACs are, use these maps and lists to help you determine which MAC is of most interest to you.

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A/B MACs and HH+H Areas

A/B MACs process Medicare Part A and Medicare Part B claims for a defined geographic area or “jurisdiction,” servicing institutional providers, physicians, practitioners, and suppliers.  Four of the A/B MACs also process HH+H claims in addition to their typical Medicare Part A and Part B claims.  Please note that the four HH+H areas do not coincide with the jurisdictional areas covered by these four A/B MACs.  Learn more about the A/B MAC in each jurisdiction.

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DME MACs

The DME MACs process Medicare Durable Medical Equipment, Orthotics, and Prosthetics (DMEPOS) claims for a defined geographic area or "jurisdiction," servicing suppliers of DMEPOS.  Learn more about the DME MAC in each jurisdiction.

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