Who are the MACs
On this page:
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.
- A/B MAC Jurisdiction Map (PDF)
- HH+H MAC Jurisdiction Map (PDF)
- DME MAC Jurisdiction Map (PDF)
- MACs by State (PDF)
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.
- A/B MAC Jurisdiction 5
- A/B MAC Jurisdiction 6 (Processes HH+H claims)
- A/B MAC Jurisdiction 8
- A/B MAC Jurisdiction 15 (Processes HH+H claims)
- A/B MAC Jurisdiction E
- A/B MAC Jurisdiction F
- A/B MAC Jurisdiction H
- A/B MAC Jurisdiction J
- A/B MAC Jurisdiction K (Processes HH+H claims)
- A/B MAC Jurisdiction L
- A/B MAC Jurisdiction M (Processes HH+H claims)
- A/B MAC Jurisdiction N
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.
Downloads
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AB-Jurisdiction-Map_03.28.2023.pdf (PDF) -
HHH-Jurisdiction-Map_03.28.2023.pdf (PDF) -
DME-Jurisdiction-Map_03.28.2023.pdf (PDF) -
MACs-by-State_03.28.2023.pdf (PDF)