What Is Medicare Supplement?
Medicare Supplement or Medigap is extra health insurance that you buy from a private company to pay health care costs not covered by Original Medicare, such as co-payments, deductibles, and health care if you travel outside the U.S. Medigap policies don’t cover long-term care, such as stays in a nursing facility, or dental care, vision care, hearing aids, eyeglasses, and private-duty nursing. Most plans do not cover prescription drugs.
You pay a monthly premium for a Medigap policy.
Medigap policies are only available to people who already have Medicare Part A, which helps pay for hospital services, and Medicare Part B, which covers the cost for doctor services. People who have a Medicare Advantage plan cannot get a Medigap plan.