Medicare is the federal health insurance program for people who are 65 or older, certain younger people with disabilities, and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD).
Part A covers inpatient hospital stays, care in a skilled nursing facility, hospice care, and some home health care. Part B covers certain doctors’ services, outpatient care, medical supplies, and preventive services.
A Medicare Advantage Plan is a type of Medicare health plan offered by a private company that contracts with Medicare to provide you with all your Part A and Part B benefits. Medicare Advantage Plans include Health Maintenance Organizations, Preferred Provider Organizations, Private Fee-for-Service Plans, Special Needs Plans, and Medicare Medical Savings Account Plans. If you’re enrolled in a Medicare Advantage Plan, Medicare services are covered through the plan and aren’t paid for under Original Medicare. Most Medicare Advantage Plans offer prescription drug coverage.
Part D adds prescription drug coverage to Original Medicare, some Medicare Cost Plans, some Medicare Private-Fee-for-Service Plans, and Medicare Medical Savings Account Plans. These plans are offered by insurance companies and other private companies approved by Medicare. Medicare Advantage Plans may also offer prescription drug coverage that follows the same rules as Medicare Prescription Drug Plans.
You may want to get coverage that fills gaps in Original Medicare coverage. You can choose to buy a Medicare Supplement Insurance (Medigap) from a private company
If you join a Medicare Advantage Plan, you can’t use Medicare Supplement Insurance (Medigap) to pay for out-of-pocket costs you have in a Medicare Advantage Plan. If you already have a Medicare Advantage Plan, you can’t be sold a Medigap policy. You can only use a Medigap policy if you disenroll from your Medicare Advantage Plan and return to Original Medicare.