medicare advantage definition
Medicare Advantage (MA) is a United States health insurance program of managed health care (preferred provider organization (PPO) or health maintenance organization (HMO)) that serves as a substitute for Original Medicare Parts A and B Medicare benefits.edicare pays plans under a bidding process, and plans submit âbidsâ based on estimated costs per enrollee for services covered under Medicare Parts A and B; all bids that meet the necessary requirements are accepted.