Medicare General Information, Eligibility and Entitlement Manual (Pub. 100-01), Ch. 1 § 50
Role of A/B MACs (B) and DME MACs
50 - Role of A/B MACs (B) and DME MACs
(Rev. 1, 09-11-02)
The law requires the Secretary, DHHS, to enter into contracts with A/B MACs (B) and DME
MACs to serve in the operation and administration of the non-provider Part B program. A/B
MACs (B) enroll physicians, non-physician health care practitioners and other entities that will
submit claims to the A/B MAC (B), and process Medicare claims and make payments for
services and supplies covered by Part B. Other major functions include, for example, controlling
over-utilization and communicating with beneficiaries and the health community.
DME MACs have been given the responsibility of processing durable medical equipment,
prosthetic, orthotic, and supply (DMEPOS) claims. See Claims Processing Manual, chapter 1,
for description of jurisdiction.