Medicare Advantage is a type of health insurance that private companies offer and Medicare approves. If you join, you'll get your care from a group of doctors and hospitals that the plan chooses. Instead of using traditional Medicare, you can get your Part A (hospital insurance), Part B (medical insurance), and Part D (drug coverage) benefits from a Medicare Advantage plan. These plans often have networks of doctors, like HMOs or PPOs. They must cover the same things as Original Medicare Part A & Part B.