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A/B MAC Jurisdictions

In April 2006, the Centers for Medicare & Medicaid Services (CMS) began to award Medicare claims processing contracts for Part A and Part B through competitive procedures. 

Through the initial series of Part A and Part B (A/B) Medicare Administrative Contractor (MAC) procurements, Medicare's claims processing operations have realized significant operational savings from the consolidation of state workloads and the efficiencies gained through integrating A/B functionality.  The A/B map in the "Download" section below, reflects the current status of MAC consolidation.  The Centers for Medicare & Medicaid Services (CMS) believes that the efficiency and effectiveness of its contracted Medicare claims operations can be further increased by consolidating some of the smaller A/B MAC workloads to form larger A/B MAC jurisdictions, further reducing the size range among the A/B MACs.  CMS also believes that reducing the number of A/B MAC contracts to ten will improve the efficiency and effectiveness of CMS's internal MAC procurement and contract administration processes. 

To achieve its ultimate goal of ten A/B MAC contracts, over the next several years, CMS will consolidate the following ten A/B MAC workloads, comprising five pairings, to form five consolidated A/B MAC contracts. 


• Jurisdictions 2 and 3 were combined to form A/B MAC Jurisdiction F (Alaska, Washington, Oregon, Idaho, North Dakota, South Dakota, Montana, Wyoming, Utah, and Arizona)
• Jurisdictions 4 and 7 were combined to form A/B MAC Jurisdiction H (Louisiana, Arkansas, Mississippi, Texas, Oklahoma, Colorado, and New Mexico)
• Jurisdictions 13 and 14 were combined to form A/B MAC Jurisdiction K  (New York, Connecticut, Massachusetts, Rhode Island, Vermont, Maine, and New Hampshire)
• Jurisdictions 8 and 15 will be combined to form A/B MAC Jurisdiction I (Kentucky, Ohio, Michigan, and Indiana)
• Jurisdictions 5 and 6 will be combined to form A/B MAC Jurisdiction G (Minnesota, Wisconsin, Illinois, Kansas, Nebraska, Iowa, and Missouri

See the "Download" below for a map of the consolidated A/B MAC jurisdictions.

The user can also access facts sheets for each jurisdiction in the "Related Links" area below.