Switching Medicare drug plans? Your monthly payment option doesn't come with you

If you have Medicare drug coverage and expensive prescriptions, you might pay a lot at the pharmacy early in the year. Starting January 1, 2027, the most you'll pay out of pocket for covered Part D drugs in a year is $2,400. That doesn't include your plan premium. (Medicare.gov) But you could hit most of that in the first few months.

The Medicare Prescription Payment Plan lets you spread those costs into monthly bills across the year. It's free. But few people use it. In 2025, fewer than 4 in 100 people who reached the yearly drug cost cap had signed up, based on one industry analysis of Medicare claims. (Avalere) That count left out people with Extra Help and people in employer plans, and the analysis was paid for by a drug industry group.

How it works

  • You pay $0 at the pharmacy for covered drugs. Your plan sends you a monthly bill instead.
  • There's no fee and no interest.
  • It does not lower what you pay in total. It changes when you pay.
  • Anyone with a Medicare drug plan, or a Medicare Advantage plan with drug coverage, can use it.

(Medicare.gov)

Who it helps most

It helps most if you have high drug costs early in the year. It may not help if your costs are low or steady each month. If you get Extra Help, this payment option may not help you. If your income and savings are limited, check whether you qualify for Extra Help, which lowers what you pay. You can apply at ssa.gov. (Medicare.gov)

Joining earlier in the year gives you more months to spread costs. Medicare.gov suggests signing up before September, if you can. (Medicare.gov)

The open enrollment catch

If you're already in it and you stay in the same plan, it renews on its own each year unless you opt out. But if you switch to a new plan, it ends. You have to call the new plan and sign up again. (Medicare.gov)

Medicare open enrollment runs October 15 to December 7, 2026. If you're switching, call your new plan to sign up as soon as you enroll. You don't have to wait until January. (CMS guidance)

How to sign up

Call your plan (the number is on your card) or go to its website. You can sign up any time during the year. (Medicare.gov)

If you miss a payment

Your plan sends a reminder. Plans must give you at least 2 months to pay. If you don't pay by the date on the reminder, you're removed from the payment plan, but you keep your drug coverage. A plan may not let you rejoin next year while you still owe. You still owe the balance. Always pay your plan premium first so you don't lose your coverage. (Medicare.gov)

Free help

Your State Health Insurance Assistance Program (SHIP) can walk you through it for free. Find yours at shiphelp.org, or call 1-800-MEDICARE (1-800-633-4227).


This is general educational information, not legal or financial advice. Check your own plan's materials for details. The Denial Desk is not affiliated with Medicare, CMS, any drug plan, or any government agency. We don't sell or recommend plans.

AI disclosure: This post was drafted with help from AI tools, then reviewed and fact-checked by our founder, a certified medical coding professional.

Last reviewed: October 2026

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