| The Centers for Medicare & Medicaid
Services (CMS) uses a network of contractors called Medicare Administrative Contractors (MAC) to
claims, enroll health care providers in the Medicare program and
educate providers on Medicare billing requirements. MACs also handle
claims appeals and answer beneficiary and provider inquiries. Even
though Section 1861 of the Social Security Act (“the act”) defines the
items and services for which Medicare may pay, in many cases, MACs may
have more defined policies than what is included in Medicare's National
Coverage Determinations (NCDs). MACs publish a Local Coverage
Determination (LCD) for the jurisdiction(s)
they serve to clarify policies.
CMS determined that contracted Medicare claims operations could increase in efficiency and effectiveness by consolidating some of the smaller Part A and Part B MAC workloads to form larger A/B MAC jurisdictions. In March 2014, this consolidation process was temporarily halted. Click here to read more about consolidation halt.
Use the Find Your MAC tool on the right to find your state's MAC information.
Find Your MAC
- Medicare MAC information
- Part A/Part B MAC information
- Medicare Carriers Manual - Local Coverage Determinations
- Find Your MAC tool.