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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T

Tier

Part D

A level in a Part D formulary that determines how much you pay for a drug. Most plans have 4–5 tiers. Generic drugs are typically in lower tiers with lower copays; brand-name and specialty drugs are in higher tiers with higher copays or coinsurance.

Also known as: Drug tier

Related: Formulary Brand-name drug Generic drug Part D

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