108 Medicare Terms Defined

Medicare Glossary

Plain-English definitions for every Medicare term — from ABN to ZIP enrollment. No jargon, no confusion.

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F

Fee-for-Service (FFS)

Medicare Basics

A payment model where health care providers are paid for each service, procedure, or test performed. Original Medicare (Parts A and B) is a fee-for-service program, meaning Medicare pays separately for each covered service.

Also known as: FFS

Formulary

Part D

A list of prescription drugs covered by a Medicare Part D plan or Medicare Advantage plan with drug coverage. Drugs are organized into tiers, with each tier having a different cost. Plans can change their formularies annually.

Also known as: Drug list, Preferred drug list

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