Medicare Part D Coverage Phases: How does Part D work?

UPDATED Nov. 23, 2024.  There are three Medicare Part D coverage phases (stages). The numbers below are for the year 2025.

Annual Deductible – The First stage of Medicare Part D Coverage Phases

The Annual Deductible is amount you must pay for your prescription drug plan before plan starts to pay. In 2025 the deductible is $590.

Initial Coverage: Copayments and coinsurance

During the Initial Coverage you pay for each covered drug a copayment/coinsurance (defined by the plan), and the plan pays its share. The typical coinsurance is 25%, i.e., you are paying 25% of the drug costs, but the insurance company pays the rest. The initial coverage continues until you reach the $2,000 out-of-pocket cap.

Donut Hole (Coverage Gap) – Eliminated

The Coverage Gap phase is eliminated in 2025

Catastrophic Coverage

A $2,000 cap on out-of-pocket spending for covered Part D drugs. Once you reach this amount, you’ll automatically qualify for catastrophic coverage and won’t pay more out-of-pocket for the rest of the year for formulary drugs. 

 

US Government Sources

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