Medicare Supplement (also known as Medigap) covers things that Original Medicare doesn’t, like copays, deductibles, and coinsurance. It does all this with a steady, predictable, monthly bill you can budget for. And it can’t be cancelled. It will be renewed for as long as you pay your premium on time.
You can add a Prescription Drug Plan and a Dental plan to Medicare supplement insurance to get even more coverage.
You have to get Medicare supplement insurance through a private insurer. You’ll have to pay a monthly premium and depending on the plan you may also have copays.