How the Part D Deductible Works
The deductible is the first phase of Part D coverage. During this phase, you pay 100% of the cost of your covered drugs until you've spent the deductible amount. After meeting the deductible, you move into the initial coverage phase where you pay copays or coinsurance based on your drug's tier.
Not all drugs are subject to the deductible. Many plans waive the deductible for Tier 1 (preferred generic) drugs, meaning you pay only a small copay from day one.
2026 Part D Deductible Amounts
Key deductible facts for 2026:
| Item | Amount |
|---|---|
| Maximum Allowable Deductible | $615 |
| Average Deductible (plans with deductible) | ~$400 – $500 |
| Plans with $0 Deductible | Available in most regions |
| Deductible for Tier 1 Generics (many plans) | $0 |
Plans with $0 Deductible
Many Part D plans offer $0 deductibles, particularly for generic drugs. However, these plans typically have higher monthly premiums to offset the lower cost-sharing. When comparing plans, look at the total annual cost (premium + deductible + copays) rather than just the deductible amount.
A plan with a $0 deductible and $50/month premium may cost more annually than a plan with a $615 deductible and $15/month premium - especially if you only take generics. Always compare total estimated annual costs.