You join a Medicare-approved plan from a private company that offers an alternative to Original Medicare for your health and drug coverage. In most cases, you’ll need to use doctors who are in the plan’s network. Includes:
Part A coverage Hospital
Part B doctor's services
Most plans include: Part D drug coverage Medicare drug coverage (Part D)
Some extra benefits (that Original Medicare doesn’t cover – like vision, hearing, and dental services) You must have both Part A and Part B to join a Medicare Advantage Plan.