Medicare Advantage (Part C) (MA)is a health insurance program of managed health care (PPO or HMO) that serves as a substitute for “Original Medicare” Parts A and B Medicare benefits. Medicare Part A provides payments for in-patient hospital services excluding those of physicians and surgeons. Part B provides payments to physicians and surgeons, as well as for medically necessary outpatient hospital services (such as ER, laboratory, x-rays and diagnostic tests) and certain durable medical equipment and supplies. Original Medicare claims payments are processed through the Centers for Medicare and Medicaid Services (“CMS”). In contrast, Medicare Advantage is offered by commercial insurance companies and HMO and PPO corporations, who receive compensation from the federal government, but do not process claims through the CMS.