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Part D deductible for 2026

What the deductible is, how it works, and what it means for your out-of-pocket costs.

What is the Part D deductible?

The deductible is the amount you pay out of pocket for your prescription drugs before your plan begins to share costs. Once you meet the deductible, you move into the initial coverage phase where you pay copays or coinsurance.

How the deductible works in practice

Not all plans have a deductible, and plans that do may not apply it to all drugs. Common patterns include:

  • $0 deductible plans — your plan starts sharing costs from your first prescription
  • Partial deductible — the deductible only applies to certain drug tiers (typically Tiers 3, 4, and 5), while generic drugs are covered from day one
  • Full deductible — you pay full price for all drugs until the deductible is met

More plans have deductibles in 2026

Due to industry-wide changes following the Part D redesign, deductibles are becoming more common across Part D plans. When comparing plans, check whether a deductible applies and which drug tiers it covers.

The deductible counts toward your cap

Everything you pay during the deductible phase counts toward your $2,100 annual out-of-pocket cap. So if your deductible is $590, that's $590 closer to the cap — after which you pay $0 for covered drugs.

Insulin is exempt

The $35 monthly insulin cap applies regardless of your deductible. Even if you haven't met your deductible yet, you'll never pay more than $35 for a month's supply of covered insulin.