Part A. Part A covers inpatient hospital stays, care in a skilled nursing facility, hospice care, and some home health care. coverage if you or your spouse paid Medicare taxes for a certain amount of time while working. This is sometimes called “premium-free Part A.” Most people get premium-free Part A.

Part B. Medicare Part B helps cover medical services like doctors’ services, outpatient care, and other medical services that Part A doesn’t cover. Part B is optional. Part B helps pay for covered medical services and items when they are medically necessary.  Most people have to pay a premium to get Part B from Medicare.

Part C. A Medicare Advantage is another way to get your Medicare Part A and Part B coverage. Medicare Advantage Plans, sometimes called “Part C” or “MA Plans,” are offered by Medicare-approved private companies that must follow rules set by Medicare. If you join a Medicare Advantage Plan, you’ll still have Medicare but you’ll get most of your Part A and Part B coverage from your Medicare Advantage Plan, not Original Medicare.

Part D. Medicare Part D is a voluntary outpatient prescription drug benefit for people with Medicare, provided through private plans approved by the federal government. Beneficiaries can choose to enroll in either a stand-alone prescription drug plan (PDP) to supplement traditional Medicare or a Medicare Advantage prescription drug plan (MA-PD), mainly HMOs and PPOs, that cover all Medicare benefits including drugs.