You can cancel Medicare Part D during specific windows, and the process depends on whether you're dropping it entirely or switching to a different plan

Medicare Part D (prescription drug coverage) can be cancelled or changed during Open Enrollment, which runs from October 15 to December 7 each year. You can also make changes during your plan's trial period (the first three months after you join) or if you may have access to for a Special Enrollment Period due to a life event like losing other drug coverage or moving to a new state. Outside these windows, you're locked into your plan for the rest of the calendar year.

If you cancel Part D entirely and go without drug coverage, you may face a late enrollment penalty — an extra charge added to your premium if you rejoin later. The penalty amount depends on how long you went without coverage and changes each year. If you have other creditable drug coverage (from an employer, union, or VA), you may not owe a penalty, but you'll need to prove it.

Key Takeaways

  • Open Enrollment (October 15 to December 7) is the main window to cancel or change Part D, and changes take effect January 1.
  • You have three months after first joining a plan to cancel without penalty, even outside Open Enrollment.
  • Dropping Part D without other drug coverage triggers a late enrollment penalty if you rejoin later.
  • Special Enrollment Periods allow changes outside the regular window if you move, lose coverage, or experience certain life events.
  • Contact your plan directly by phone or through Medicare.gov to request cancellation — do not wait for paperwork to arrive.

Cancelling during Open Enrollment (October 15 to December 7)

Open Enrollment is the easiest and most common time to cancel Part D. You can switch to a different plan, drop Part D altogether, or make other changes to your Medicare coverage. Any changes you make during this window take effect on January 1 of the following year.

To cancel during Open Enrollment, contact your current Part D plan directly — call the number on your insurance card or visit their website. You can also call Medicare at 1-800-MEDICARE (1-800-633-4227) and ask to speak with a representative who can help you cancel. Have your Medicare number ready. If you prefer to do it online, log into Medicare.gov, go to "Manage Your Health and Prescription Drug Coverage," and follow the prompts to make changes.

You'll receive a confirmation letter from your plan within 30 days. Keep this letter for your records. If you don't receive it by mid-January, call your plan to confirm the cancellation went through.

Cancelling within the first three months of joining (trial period)

If you recently joined a Part D plan and want to cancel, you have a three-month trial period from your coverage start date. During this window, you can cancel without a late enrollment penalty, even if it's not Open Enrollment. This is your chance to try a plan and switch if it doesn't work for you.

To use your trial period, call your plan or Medicare at 1-800-MEDICARE and request cancellation. Tell them you want to end coverage effective when ready or on a specific date. You'll receive written confirmation. If you cancel during the trial period and rejoin a different plan later, you won't owe a penalty for the gap in coverage.

Cancelling outside Open Enrollment (Special Enrollment Periods)

If you experience certain life events, you may may have access to for a Special Enrollment Period that lets you cancel or change Part D outside the regular October-December window. These events include moving to a new state, losing other drug coverage, getting married or divorced, or having a significant change in income.

To use a Special Enrollment Period, call Medicare at 1-800-MEDICARE within 60 days of your may have access to event and describe what happened. Medicare will tell you whether you may have access to and what documentation you need to provide (such as a letter from your former employer confirming you lost coverage). Once approved, you can cancel your current plan and the change takes effect within one to three months, depending on when you request it.

Understanding the late enrollment penalty

If you cancel Part D and do not have other creditable drug coverage, you will owe a late enrollment penalty if you rejoin later. The penalty is calculated based on the number of months you went without Part D coverage and the national average premium for that year. The penalty amount changes annually and is added to your Part D premium for as long as you have coverage.

For example, if you go without coverage for 12 months and the national average premium is $35, your penalty might be around $4.20 per month (12 months × 35% of the average). The exact calculation varies, but the longer you wait to rejoin, the higher your penalty. The penalty does not expire — it stays with you permanently unless you have a period of creditable coverage that resets it.

If you have other creditable drug coverage (such as from a current or former employer, a union, the VA, or Tricare), you do not owe a penalty when you drop Part D. You'll need to provide proof of that coverage when you rejoin Part D later. Ask your other insurance provider for a letter stating that your coverage is creditable.

What happens after you cancel

Once your cancellation is processed, your Part D coverage ends on the date you requested or on December 31 if you cancelled during Open Enrollment. You will no longer be able to use your Part D plan to fill prescriptions. If you have prescriptions you need to refill, do so before your coverage ends or work with your doctor to find a way to cover the cost after cancellation.

If you cancelled during Open Enrollment and chose a different Part D plan instead, your new plan's coverage begins on January 1. Make sure you have the new plan's formulary (list of covered drugs) and pharmacy network before your old coverage ends, so you know where to fill prescriptions and whether your medications are covered.

You will continue to receive mail from Medicare and your former plan for a few months after cancellation. This is normal. If you have questions about what happened to your account, call your former plan or Medicare.

Rejoining Part D after cancellation

If you cancelled Part D and want to rejoin, you can do so during the next Open Enrollment (October 15 to December 7) or if you may have access to for a Special Enrollment Period. Your new coverage will begin on January 1 (if you join during Open Enrollment) or within one to three months (if you use a Special Enrollment Period).

When you rejoin, you will owe a late enrollment penalty unless you had other creditable drug coverage during the time you were not enrolled in Part D. The penalty is permanent and will be added to your monthly premium. To avoid or reduce the penalty, make sure you have proof of any other drug coverage you had while you were not in Part D — this proof can sometimes reset the penalty clock.

Frequently Asked Questions

Can I cancel Part D in the middle of the year?

Only if you may have access to for a Special Enrollment Period due to a life event like moving, losing other coverage, or a major change in circumstances. Otherwise, you must wait for Open Enrollment (October 15 to December 7). If you recently joined a plan, you have a three-month trial period to cancel without penalty.

Will I owe a penalty if I cancel Part D?

You will owe a late enrollment penalty only if you rejoin Part D later and did not have other creditable drug coverage while you were not enrolled. The penalty is a percentage of the national average premium and is added to your monthly premium permanently. If you had other coverage (employer, VA, Tricare), you may not owe a penalty — ask your former provider for proof.

What if I need my prescriptions filled after I cancel?

Refill your prescriptions before your coverage ends, or ask your doctor about generic alternatives or patient information programs that may help with costs. Some pharmacies offer discount programs for uninsured customers. If you rejoin Part D during Open Enrollment, your new coverage begins January 1.

How do I know if my other insurance is creditable drug coverage?

Contact your other insurance provider (employer, union, VA, Tricare) and ask them to confirm in writing that your coverage is creditable under Medicare rules. Keep this letter — you'll need it to show Medicare if you rejoin Part D later and want to avoid or reduce the late enrollment penalty.

What if I cancel by mistake?

If you cancelled during Open Enrollment, you can rejoin during the same Open Enrollment period (through December 7) and your new plan will still start January 1. If you cancelled outside Open Enrollment, you'll need to wait for the next Open Enrollment or may have access to for a Special Enrollment Period. Call Medicare at 1-800-MEDICARE to discuss your options.