Premium— You must keep paying your Medicare Part B premium in addition to the Medigap premium if you enroll in any Medicare supplement coverage plan.

Deductible— A deductible is the annual out-of-pocket expense a policyholder must meet before their insurance company pays for medical care.

Coinsurance— Coinsurance refers to the portion of a patient’s treatment bill they are responsible for paying out of pocket. This amounts to 20% of your Medicare Part B premium.

Copayment— A copayment is a set financial amount an insured person must pay for specific medical services. Medicare typically covers prescription medications.