Medicare Glossary: Simple Definitions & Terms

An agreement by a doctor, supplier, or provider to accept the Medicare-approved amount as full payment for a covered service. Providers who accept assignment cannot bill you for more than that amount, aside from normal deductibles and coinsurance.

The highest amount a non-participating provider who does not accept assignment is allowed to charge for a Medicare-covered service — capped at 15% above the Medicare-approved amount.

A doctor or supplier who does not accept Medicare assignment but is still enrolled in Medicare. They may charge up to 15% more than the Medicare-approved amount (the limiting charge). Medicare will still pay its share, but you may pay more.

A doctor, hospital, or other health care provider who accepts Medicare assignment — meaning they agree to accept the Medicare-approved amount as full payment for covered services.