Part C (Medicare Advantage) sometimes called "MA Plans," are health plans offered by private companies approved by Medicare. If you join a Medicare Advantage Plan, the plan includes your Part A (Hospital Insurance) and Part B (Medical Insurance) coverage.

Medicare Advantage Plans must follow rules set by Medicare. However, each plan can charge different out-of-pocket costs and have different rules for how you get services (like whether you need a referral to see a specialist or if you have to go to only doctors, facilities, or suppliers that belong to the plan). You usually pay one monthly premium to the Medicare Advantage plan, in addition to your Part B premium.

Continue to Part D

Find out about Medicare Supplement Insurance.