The short answer
Many Part D drug plans have an annual deductible — an amount you pay for covered drugs before the plan starts sharing the cost. That's why your prescriptions can cost noticeably more at the start of the year: you're paying through the deductible in January before the plan kicks in. Once you meet it, you move into the plan's regular copay or coinsurance structure.
Not every plan has a deductible, and not every drug is subject to it, which is why understanding your plan's structure prevents January sticker shock.
How the deductible works
If your plan has a deductible, you pay the full negotiated price for covered drugs until your spending reaches the deductible amount for the year. After that, you pay the plan's copays or coinsurance. The deductible resets every January, which is exactly why the same prescription can cost more early in the year than later.
Some plans apply the deductible only to higher-tier drugs, so your generics may skip it entirely. Our guide to the Part D coverage phases explains how the deductible fits into the year's stages.
How to plan for it
Expect higher drug costs in the first weeks of the year if your plan has a deductible, and budget for it rather than being surprised. When comparing plans, weigh the deductible alongside the premium and copays — a plan with no deductible but a higher premium can be cheaper overall for some people, and vice versa.
The right balance depends on your specific drugs. Our doctor and drug coverage tool helps you compare total annual cost, deductible included.
Frequently Asked Questions
What is the Part D deductible?
An annual amount you pay for covered drugs before your plan starts sharing the cost. It resets every January, which is why prescriptions can cost more early in the year.
Do all Part D plans have a deductible?
No. Some plans have no deductible, and some apply it only to higher-tier drugs, so your generics may skip it. Check your plan's structure.
Why do my drugs cost more in January?
Because you're paying through the annual deductible before the plan begins sharing costs. Once you meet it, you move into the plan's regular copays.
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