Medicare covers health services and supplies that would be considered medically necessary to treat a condition or disease, such as lab tests, surgeries and doctor visits. If you’re in a Medicare Advantage plan, you may have different rules, but you must have at least the same coverage as Original Medicare.

In general, Part A covers hospital care, skilled nursing care, hospice and home health services. Part B general covers outpatient hospital care, services from other physicians and health care providers, home health care, durable medical equipment and some preventative services.

Medicare Supplement plans add additional coverage to fill in the “gaps” of Original Medicare.