When and How You Can Switch Medicare Plans

You can switch Medicare plans during specific windows each year, and the rules differ depending on which type of plan you have and what triggered the change.

Medicare gives you chances to change plans at set times, not whenever you want. The main window is the Annual Enrollment Period (AEP), which runs October 15 through December 7 each year. During this time, you can switch between Original Medicare and Medicare Advantage, move from one Advantage plan to another, or change your prescription drug coverage. Changes made during AEP take effect January 1.

Outside of AEP, you can switch plans only if you have a may have access to life event — things like moving to a new state, losing employer coverage, or having a major change in income. You also get a separate window if you're unhappy with your current plan's network or drug formulary, though this window is shorter and has stricter limits.

Key Takeaways

• The Annual Enrollment Period runs October 15 through December 7 each year, and any changes you make take effect January 1.
• Outside of AEP, you can only switch plans if you experience a may have access to life event like moving, losing coverage, or a major income change.
• If your doctor or pharmacy leaves your plan's network, you may be able to switch plans outside the normal enrollment window.
• Once you switch plans, you cannot switch back to your old plan until the next AEP, so confirm your choice before the deadline.
• Medicare Advantage plans have their own disenrollment period in January when you can switch back to Original Medicare without a may have access to reason.

The Annual Enrollment Period: October 15 through December 7

This is the main time every Medicare beneficiary can change plans. You have nearly two months to review your options, compare costs, and make switches. Any plan changes you make during AEP take effect on January 1 of the following year.

During AEP, you can move from Original Medicare to a Medicare Advantage plan, switch from one Advantage plan to another, drop or add prescription drug coverage (Part D), or switch to a different Part D plan. You can also move from Medicare Advantage back to Original Medicare, though if you do this, you should also enroll in a Medigap policy at the same time to avoid gaps in coverage.

The deadline is firm: December 7 at 11:59 p.m. Eastern time. If you miss this date, you're locked into your current plan until the next AEP unless you have a may have access to life event.

may have access to Life Events That Open a Special Enrollment Period

If something major happens to you outside of AEP, you may get a Special Enrollment Period (SEP) lasting 60 days. This lets you change plans without waiting for October. Common may have access to events include moving to a new state or county, losing employer-sponsored coverage, becoming may be able to access for Medicaid, having a significant change in income, or experiencing a death in your household.

You must report the life event to Medicare within 60 days of when it happened. Contact Medicare at 1-800-MEDICARE or go to Medicare.gov to report your event and find out which plans you can switch to. Not all life events open all plan options — for example, if you move, you can only switch to plans available in your new location.

Some life events have their own rules. If you lose employer coverage, you have 63 days from the date coverage ends to enroll in a new plan. If you become newly may be able to access for Medicaid, your SEP window is 60 days from the date Medicaid coverage starts.

The Medicare Advantage Disenrollment Period in January

If you're in a Medicare Advantage plan, you get one more chance each year to switch without a may have access to reason. This is the Medicare Advantage Open Enrollment Period (OEP), which runs January 1 through January 31. During this month, you can switch to a different Medicare Advantage plan or go back to Original Medicare.

This window is only for people already in Advantage plans — you cannot use it to enroll in Advantage for the first time. Changes made during the January OEP take effect on the first day of the following month. For example, if you disenroll on January 15, your coverage switches on February 1.

This is a safety valve if you discover your Advantage plan isn't working for you after January 1. You don't need a reason to use it, but you only get this one month, so act before January 31 ends.

Switching Because Your Doctor or Pharmacy Left Your Plan

If your primary care doctor, specialist, or pharmacy leaves your plan's network after you've enrolled, you may be able to switch plans outside the normal windows. This is called a network change SEP. The rules are strict: the provider must have actually left the network, and you must have been seeing them while they were in-network.

You have 60 days from the date the provider left the network to switch plans. Contact your current plan first to confirm the provider is no longer in-network, then call Medicare at 1-800-MEDICARE to report the change and find out which plans include that provider. You'll need to provide the provider's name and the date they left the network.

This protection does not cover situations where a provider stops accepting your plan's insurance but stays in-network with other plans. It also does not apply if you chose a plan knowing the provider was not in-network. The change must be unexpected.

What Happens If You Miss a Deadline

If you miss the AEP deadline in December or a Special Enrollment Period deadline, you cannot change plans until the next AEP in October — with one exception. If you're in a Medicare Advantage plan, you still have the January disenrollment period to switch back to Original Medicare or to a different Advantage plan.

Missing a deadline can be costly. If you realize in February that your plan doesn't cover a medication you need, you're stuck paying out-of-pocket or using the plan's appeals process until October. If you move to a state where your plan doesn't operate, you cannot switch until AEP, even though your current plan may not be available to you.

The only exception to the locked-in rule is if you can document a may have access to life event that happened after you missed the deadline. For example, if you miss AEP but then lose your job in January, you can report that job loss and get a new 60-day window to switch.

How to Switch Plans During an Open Enrollment Period

You have three ways to change plans: online through Medicare.gov, by phone with Medicare at 1-800-MEDICARE, or in person at a local Social Security office. The online method is fastest — you can compare plans side by side, see your out-of-pocket costs for your current medications, and complete the switch in one session.

To switch online, go to Medicare.gov, sign in to your account, and select "Change Plans." You'll enter your zip code, current plan, and the medications you take. Medicare will show you all available plans ranked by estimated cost. Review the drug formulary (the list of covered medications) and the provider network before you confirm your choice.

If you call 1-800-MEDICARE, a representative can walk you through your options and answer questions about specific plans. This takes longer — allow 20 to 30 minutes — but it's useful if you're unsure which plan fits your needs. Have your current plan documents and a list of your medications ready when you call.

Frequently Asked Questions

Can I switch plans more than once during the Annual Enrollment Period?

Yes. You can make multiple changes during AEP (October 15 through December 7), but only your final choice counts. If you enroll in Plan A on November 1 and then switch to Plan B on November 20, you'll be in Plan B on January 1. Medicare processes only your last enrollment, so there's no penalty for changing your mind.

What if I switch to a new plan and then realize I made a mistake?

If you switched during AEP, you're locked into your new plan until the next AEP in October — unless you have a may have access to life event. If you switched during the Medicare Advantage January disenrollment period, you cannot switch again until the next January. The only exception is if you can document a may have access to event like moving or losing coverage.

Do I have to switch plans if my doctor leaves my insurance network?

No, but you have the option to. If your doctor leaves the network, you can either find a new in-network doctor, pay out-of-network rates, or switch to a plan that includes your doctor. You have 60 days from the date the provider left to switch plans if you choose to do so.

What counts as a may have access to life event for a Special Enrollment Period?

Common may have access to events include moving to a new state or county, losing employer-sponsored health coverage, becoming newly may be able to access for Medicaid or Extra Help, having a significant change in income, or experiencing a death in your household. You must report the event to Medicare within 60 days. Contact 1-800-MEDICARE to confirm whether your situation qualifies.

If I'm in Original Medicare, do I get a January disenrollment period?

No. The January disenrollment period is only for people in Medicare Advantage plans. If you're in Original Medicare, your only chance to switch plans outside of AEP is if you have a may have access to life event that opens a Special Enrollment Period.