You can unenroll from Medicare, but the window to do it is narrow and the rules depend on which part you want to leave

Medicare unenrollment is possible, but it is not straightforward. You cannot drop all of Medicare whenever you want — the program has strict rules about when you can leave and what happens if you do. The timing depends on which part you are enrolled in (Part A, Part B, Part D, or a Medicare Advantage plan) and whether you have other coverage lined up. Most people who want out are trying to switch to an employer plan or a spouse's coverage, and those situations have specific windows when the change is allowed.

The most important thing to know: if you drop Part B or Part D outside of the allowed periods, you may face a permanent penalty on your premiums when you re-enroll later. That penalty can add 10 percent per year to your Part B premium and 1 percent per month to your Part D premium, for as long as you have Medicare. Dropping Part A (hospital insurance) is less common and usually only happens if you are still working and covered by an employer plan.

Key Takeaways

  • You can drop Part B or Part D during the General Enrollment Period (January 1 to March 31 each year), but you will face a permanent premium penalty unless you have other coverage.
  • If you are switching to an employer plan or a spouse's plan, you have a Special Enrollment Period of up to 63 days after that coverage ends or you lose it, during which you can change Medicare without penalty.
  • Medicare Advantage plans can be dropped during the Annual Enrollment Period (October 15 to December 7) or during the Medicare Advantage Open Enrollment Period (January 1 to March 31).
  • To unenroll, you must contact Medicare directly by phone, mail, or online — your doctor or insurance company cannot do it for you.
  • Dropping coverage without a penalty-free reason is permanent and costly; talk to Medicare before you decide.

Unenrolling from Part B or Part D during the General Enrollment Period

The General Enrollment Period runs from January 1 to March 31 each year. During this window, you can drop Part B (medical insurance) or Part D (prescription drug coverage) without Medicare's permission. However, dropping either one outside of a Special Enrollment Period will trigger a lifetime premium penalty.

If you are dropping Part B, your penalty is 10 percent of the standard Part B premium for each year you were not enrolled when you could have been. If you are dropping Part D, the penalty is 1 percent of the national average Part D premium for each month you were not enrolled. Both penalties stay with you permanently, even if you switch plans later. For example, if you drop Part B at age 67 and re-enroll at 72, you will pay the penalty for the rest of your life.

The only way to avoid this penalty is to have other creditable coverage — meaning an employer plan, a union plan, TRICARE, or Veterans Affairs coverage that is at least as good as Medicare. You will need to show proof of that coverage when you unenroll.

Unenrolling when you have other coverage: Special Enrollment Period

If you are switching to an employer plan, a spouse's plan, or another form of coverage, you have a Special Enrollment Period. This is a 63-day window that starts the day your other coverage ends or the day you lose it. During this period, you can drop Part B, Part D, or both without paying a penalty.

You must act within those 63 days. After that, you fall back to the General Enrollment Period rules, and the penalty clock starts. To use your Special Enrollment Period, you will need to prove that you had other coverage — usually a letter from your employer's benefits office or a copy of your plan documents showing the coverage dates.

If you are dropping Medicare because you are going back to work and your employer offers health insurance, this is your safest route. Contact Medicare as soon as you know your employer coverage will start, and ask them to confirm your Special Enrollment Period dates before you unenroll.

Dropping a Medicare Advantage plan

Medicare Advantage plans (Part C) have their own unenrollment windows. You can drop a Medicare Advantage plan and switch back to Original Medicare (Part A and Part B) during the Annual Enrollment Period, which runs October 15 to December 7 each year. The change takes effect January 1.

You also have the Medicare Advantage Open Enrollment Period from January 1 to March 31, during which you can switch to a different Medicare Advantage plan or go back to Original Medicare. If you switch back to Original Medicare during this window, you can also enroll in a Part D plan at the same time without a late penalty, as long as you do not have a gap in drug coverage.

If you want to drop your Medicare Advantage plan outside these windows, you will need a may have access to life event — such as moving out of the plan's service area, losing Medicaid, or having a change in your income. Contact your plan or Medicare to ask whether your situation qualifies.

How to contact Medicare and submit your unenrollment request

You cannot unenroll through your insurance company or your doctor. You must contact Medicare directly. You have three options: phone, mail, or online.

By phone: Call Medicare at 1-800-MEDICARE (1-800-633-4227). TTY users can call 1-877-486-2048. Have your Medicare card ready. Tell the representative which part you want to drop and when you want the change to take effect. Ask them to confirm your Special Enrollment Period dates if you have other coverage. The call usually takes 10 to 15 minutes.

By mail: Write a letter to your Medicare office. Include your name, Medicare number, date of birth, which part you are dropping, and the date you want to stop coverage. Mail it to the address on your Medicare card or to Centers for Medicare & Medicaid Services, 7500 Security Boulevard, Baltimore, MD 21244. Allow two to three weeks for processing.

Online: Log into your account at Medicare.gov. Go to "My Medicare" and look for the option to make changes to your coverage. Not all unenrollment requests can be done online; if you do not see the option, call or mail instead.

What happens after you unenroll

Once your unenrollment is processed, your Medicare coverage ends on the date you requested. If you have a Medicare Advantage plan, your coverage switches to Original Medicare on January 1 (if you dropped during the Annual Enrollment Period) or on the first of the month after your request is processed (if you dropped during the Medicare Advantage Open Enrollment Period).

If you drop Part B or Part D and do not have other coverage, you will have no insurance for those services. You will be responsible for all costs out of pocket. If you later want to re-enroll, you will have to wait for the next General Enrollment Period (January 1 to March 31), and you will owe the permanent penalty.

If you drop Part A (hospital insurance), you lose coverage for hospital stays, skilled nursing facility care, and hospice. This is rare and usually only happens if you are still working and your employer plan covers these services. Make sure your employer plan actually covers hospital care before you drop Part A.

Reasons people unenroll and what to consider first

Most people who unenroll are going back to work and switching to an employer plan, or they are moving to a different country. Some are switching to Veterans Affairs coverage or TRICARE. A smaller number are trying to drop Medicare because they believe they do not need it, which often leads to regret and penalties later.

Before you unenroll, ask yourself: Do I have other coverage that is at least as good as Medicare? Will that coverage last as long as I need it? What happens if I lose that coverage — can I get back into Medicare without a penalty? If you cannot answer yes to all three, talk to Medicare before you drop anything. The penalty for a wrong decision is permanent.

If you are unhappy with your current Medicare plan or coverage, unenrollment is not the only option. You can switch to a different Medicare Advantage plan, switch from Medicare Advantage to Original Medicare, or change your Part D plan — all during the enrollment periods — without losing coverage or facing penalties. Those changes are usually easier and safer than unenrolling entirely.

Frequently Asked Questions

What happens if I miss the important date to unenroll?

If you miss your Special Enrollment Period or the Annual Enrollment Period, you will have to wait for the next General Enrollment Period (January 1 to March 31). If you drop Part B or Part D outside of an allowed window, you will owe a permanent penalty when you re-enroll. Contact Medicare when ready if you think you missed a important date — they can sometimes extend the window if you have a good reason.

Can I unenroll from Part A without unenrolling from Part B?

Yes, you can drop Part A alone or Part B alone, or both together. However, dropping Part A is uncommon because most people need hospital coverage. If you are still working and your employer plan covers hospital care, you can drop Part A. You will need to show proof of that coverage to avoid a penalty.

Will I owe a penalty if I drop Medicare to join my spouse's plan?

No, if you have other creditable coverage through your spouse's employer or plan, you can drop Part B or Part D without a penalty during your Special Enrollment Period. You have 63 days from the date your spouse's coverage starts or from the date you lose your own coverage. Bring proof of your spouse's coverage when you contact Medicare.

What if I unenroll and then change my mind?

If you unenroll during the General Enrollment Period and change your mind, you can re-enroll during the next General Enrollment Period. However, you will owe the permanent penalty unless you had other coverage. If you unenroll during a Special Enrollment Period and change your mind within 30 days, contact Medicare to see if they can reverse the change.

Do I have to unenroll from Part D if I am dropping Medicare Advantage?

No. If you switch from Medicare Advantage back to Original Medicare during the Annual Enrollment Period or the Medicare Advantage Open Enrollment Period, you can keep your Part D plan or switch to a different one. You do not have to drop Part D unless you want to.