How Does A Provider Enroll In Medicare? 
Through a Medicare Administrative Contractor -LRB- MAC -RRB- - private organizations that carry out the administrative responsibilities of Traditional Medicare -LRB- Parts A and B -RRB- . They also handle durable medical equipment , home health and hospice claims . MACs are assigned by state ; a provider can check with CMS -LRB- Centers for Medicare and Medicaid Services -RRB- to find their applicable MAC . New eligible providers complete and submit a form -LRB- CMS-460 -RRB- to their MAC along with a Medicare enrollment application . Each year providers who are currently enrolled in the Medicare Program have an open enrollment period -LRB- Nov. 15 - Dec. 31 -RRB- when they can change their current participation status beginning the next calendar year on January 1 . 