Plan offered by a private insurance company that contracts with Medicare to provide beneficiaries with Medicare Part A and Part B benefits. Depending on where the patient lives, plans may or may not offer Medicare Part D prescription drug coverage. A Medicare Advantage Plan can be a health maintenance organization (HMO) plan, preferred provider organization (PPO) plan, special needs plan, or a private fee-for-service plan. In 2006 MA replaced the Medicare Plus (+) Choice program. Also referred to as Medicare Health Plans .