Medicare administrative contractors (MACs)
The medicare contracting reform initiative (mcr) was established to integrate the administration of medicare parts a and b fee-for-service benefits with new entities called Medicare administrative contractors (MACs).
Medicare administrative contractors (MACs) are private health care insurers whose responsibility is to administer both Medicare Part A and Medicare Part B claims. Medicare administrative contractors carry out many functions such as responding to provider inquiries, enrolling providers in the Medicare Fee-For-Service program and handling redetermination requests.