You can change your Medicare Advantage plan during specific windows each year, not whenever you want

Medicare Advantage plans lock you in for a year. Once your coverage starts on January 1, you cannot switch to a different Medicare Advantage plan or drop it for Original Medicare until the next open enrollment period arrives — with a few exceptions for people in specific situations. The main enrollment window is October 15 through December 7 each year, when changes take effect January 1. If you miss that window and do not may have access to for a special circumstance, you are stuck with your current plan until the following October.

The rules are strict because Medicare Advantage is a contract between you and a private insurance company. Unlike Original Medicare, which you can change month to month, Advantage plans require commitment. Understanding when you can actually make a change — and what counts as a may have access to reason — keeps you from discovering in February that you cannot switch out of a plan that is not working for you.

Key Takeaways

  • The annual enrollment period runs October 15 through December 7, and any changes you make take effect January 1 of the following year.
  • You can switch to a different Medicare Advantage plan, switch to Original Medicare, or drop Medicare Advantage coverage only during this window or if you have a may have access to life event.
  • may have access to life events include losing employer coverage, moving out of your plan's service area, or becoming may be able to access for Medicaid, and you typically have 60 days from the event to make a change.
  • If you miss the annual window and have no may have access to event, you cannot change plans until the next October 15, even if your doctor leaves the network or your costs rise.
  • Some people with both Medicare and Medicaid have access to a separate enrollment period from January 1 through March 31 each year.

The annual enrollment period: October 15 through December 7

Every year, Medicare opens a window when you can make changes to your coverage. This period runs from October 15 through December 7. During these weeks, you can switch from your current Medicare Advantage plan to a different one, switch from Medicare Advantage to Original Medicare, or switch from Original Medicare to a Medicare Advantage plan. Any change you make during this window takes effect on January 1 of the next year.

This is the only time most people can make a change. If you enroll in a Medicare Advantage plan on January 1, that plan is your coverage for the entire year. Your premiums, deductibles, copays, and network of doctors do not change mid-year unless you have a may have access to event. Many people wait until October to review their options, compare plans, and decide whether to stay or switch.

The important date is firm. If you want your new plan to start January 1, you must complete your change by December 7. Changes submitted after December 7 will not take effect until the following year. Medicare does not extend this important date for holidays or weekends.

may have access to life events that let you change plans outside the annual window

If something major happens to you during the year, you may be able to change your Medicare Advantage plan without waiting for October. These are called may have access to life events, and they give you a special enrollment period, usually lasting 60 days from the date of the event.

Common may have access to events include: losing health coverage through an employer or former employer, moving out of your plan's service area, becoming newly may be able to access for Medicaid or losing Medicaid coverage, getting married or divorced, having a baby or adopting a child, and becoming a U.S. citizen or lawful permanent resident. If your plan leaves the Medicare Advantage market entirely, that also triggers a special enrollment period.

You must report the event to Medicare and provide proof. For example, if you move, you need to update your address with Medicare. If you lose employer coverage, you need a letter from your employer or the plan showing the coverage ended. Medicare will not take your word for it. Once you report the event and Medicare confirms it qualifies, you will have 60 days to make a change.

What does not count as a reason to change plans

Many situations feel urgent but do not may have access to as life events. Your doctor leaving your plan's network is frustrating, but it is not a may have access to event — you cannot switch plans because of it outside the annual window. Your out-of-pocket costs rising, your copay increasing, or your plan changing its coverage rules mid-year are also not may have access to reasons. If your prescription drug coverage gets worse or a medication you need is no longer covered, that still does not trigger a special enrollment period for Medicare Advantage.

This is one of the hardest parts of Medicare Advantage for people to accept. The plan can change what it covers, which doctors are in-network, and what you pay, and you have no recourse until October unless you have a may have access to life event. If you are unhappy with your plan for these reasons, you must wait for the annual enrollment period to switch.

Special enrollment for people with both Medicare and Medicaid

If you have both Medicare and Medicaid (sometimes called "dual may be able to access"), you have an additional enrollment window. You can make changes to your Medicare Advantage plan from January 1 through March 31 each year, in addition to the October 15 through December 7 window. Changes made during this January-to-March period take effect on the first day of the following month.

This extra window exists because people with both programs often have complex coverage needs and may need more flexibility. You still have the regular October-to-December window as well, so you have two chances per year to make a change if you are dual may be able to access.

How to make a change during enrollment periods

You can change your plan through Medicare.gov, by phone, or by mail. On Medicare.gov, you can compare plans side by side, see which doctors and hospitals are in each network, and check prescription drug coverage. You can enroll in a new plan directly through the website during the enrollment period.

If you prefer to talk to someone, you can call Medicare at 1-800-MEDICARE (1-800-633-4227). Representatives can walk you through your options, answer questions about specific plans, and help you enroll. You can also contact your current plan directly — they can tell you about other plans available in your area, though they cannot enroll you in a competitor's plan.

Some people work with insurance agents or brokers who specialize in Medicare. These agents are free to use and can help you compare plans and enroll. Make sure any agent you work with is licensed and has no financial incentive to push you toward a particular plan.

What happens if you miss the important date

If you do not make a change by December 7 and you have no may have access to life event, you are locked into your current plan for the entire next year. You cannot switch to a different Medicare Advantage plan, cannot switch to Original Medicare, and cannot drop your coverage. The only exception is if a may have access to event happens to you during the year.

This is why many people set a reminder in October to review their plan options. Even if you are happy with your current plan, costs and networks change every year. Spending an hour in October comparing your current plan to others available in your area can save you hundreds of dollars or prevent you from losing access to your doctor.

Frequently Asked Questions

What if my doctor leaves my plan's network in the middle of the year?

You cannot switch plans because of this outside the annual enrollment period. Your plan should notify you when a doctor leaves the network, and you can ask your doctor if they are still accepting Medicare Advantage patients from other plans. If you cannot find an in-network replacement, you must wait until October 15 to switch plans.

Can I switch back to my old plan if I change my mind?

Once your new plan starts on January 1, you cannot switch back to your old plan until the next October 15, even if you change your mind after a few weeks. This is why it is important to compare plans carefully before you enroll. You have until December 7 to make your choice, so take time to review your options.

Do I have to do anything to stay in my current plan?

No. If you do nothing during the enrollment period, your current plan automatically continues for the next year. You do not need to re-enroll or confirm anything. Your coverage will renew on January 1 with the same plan, premiums, and network.

What if I turn 65 and become may be able to access for Medicare during the year?

When you first become may be able to access for Medicare, you have an initial enrollment period of seven months centered on your birthday month. During this time, you can enroll in any Medicare Advantage plan available in your area. This is separate from the annual October-to-December window and applies only to people new to Medicare.

Can I switch from Medicare Advantage to Original Medicare outside the annual window?

Generally, no — you must wait for October 15 unless you have a may have access to life event. However, if your Medicare Advantage plan leaves the market, you can switch to Original Medicare at any time. Some people with both Medicare and Medicaid also have additional options, so contact Medicare directly if you are in this situation.