You can change Medicare plans once a year during the annual enrollment period, or when ready if you have a may have access to life event
Medicare sets a yearly window when you can switch plans without penalty. This window is called the Annual Enrollment Period, or AEP, and runs from October 15 to December 7 each year. Changes you make during this time take effect on January 1 of the following year.
Outside this window, you can change plans only if you experience a may have access to life event — a major change in your circumstances that Medicare recognizes as a reason to switch. These events include losing employer coverage, moving to a new state, getting married or divorced, or having a significant drop in income. When you have a may have access to event, you typically have 60 days from the date of the event to make a change.
If you miss the annual enrollment period and do not have a may have access to event, you are locked into your current plan until the next October 15. There is no way around this restriction, and no exceptions for changing your mind or finding a better rate.
Key Takeaways
- The Annual Enrollment Period runs October 15 to December 7 each year, and any changes you make take effect January 1.
- Outside the annual period, you can switch plans only if you have a may have access to life event such as losing coverage, moving, or a major income change.
- When you have a may have access to event, you have 60 days from the date it occurs to make your switch.
- Missing the enrollment period without a may have access to event means you cannot change plans until the following October, so marking the dates on your calendar matters.
What counts as a may have access to life event
Medicare recognizes a specific list of events that let you change plans outside the annual window. The most common ones are losing health coverage through an employer or spouse's employer, moving to a different state or county, getting married or divorced, and having a child or adopting one. Death of a spouse, a significant drop in income, or becoming a U.S. citizen also may have access to.
Less obvious events count too. If your current plan leaves the Medicare program in your area, you can switch. If you become may be able to access for Medicaid or lose Medicaid coverage, that triggers a special enrollment period. If you are in a skilled nursing facility or long-term care facility, you have different rules that allow more frequent changes.
The key is that the event must have happened recently — usually within the last 60 days — and you must report it to Medicare or your plan when you request the change. You may need to provide proof, such as a marriage certificate, a notice from your employer, or a letter showing your new address.
How to make a change during the annual enrollment period
During October 15 to December 7, you can change plans by visiting Medicare.gov, calling 1-800-MEDICARE, or meeting with a counselor in person. Medicare.gov has a tool called "Find Care Providers" and "Compare Plans" that shows you what is available in your zip code, what each plan costs, and which doctors and pharmacies are in each network.
When you compare, look at the monthly premium, the deductible, copayments for the services you use most, and whether your current doctors are in the plan's network. Many people focus only on the premium and miss that a cheaper plan might have higher copayments or exclude their preferred pharmacy. Spend time on the comparison tool — it is free and shows real numbers for your area.
Once you choose a new plan, you can enroll through the same channels: the website, the phone line, or in person. Confirmation comes by mail, and your new coverage starts January 1. Your old plan ends December 31, so there is no gap, but make sure you understand the effective date before you stop using your current plan's benefits.
How to make a change after a may have access to life event
If you have a may have access to event, contact Medicare or your plan as soon as possible. You have 60 days from the date of the event, so waiting is risky — if you miss the window, you go back to the annual enrollment period rule and cannot switch until October.
Call 1-800-MEDICARE and tell them what happened. They will ask for details and may ask for proof. Have your Social Security number, Medicare number, and documentation of the event ready. If you lost employer coverage, bring the letter from your employer or the plan saying coverage ended. If you moved, have your new address. If your income dropped, have recent tax documents or a letter from your employer.
Medicare will tell you whether the event qualifies and, if it does, will give you a special enrollment period — usually 60 days to make your change. You can then switch plans using Medicare.gov, the phone line, or in person, just as you would during the annual period. Your new plan typically starts the first of the month after you enroll, though this varies by plan.
What happens if you miss the enrollment period
If you do not change plans during the October 15 to December 7 window and you do not have a may have access to life event, you stay in your current plan. You cannot switch until the next October 15, even if your plan raises its premium, changes its network, or stops covering a drug you need.
The only exception is if your plan itself leaves Medicare in your area. If that happens, Medicare sends you a notice, and you get a special enrollment period to pick a new plan. This is rare, but it does happen — plans sometimes withdraw from certain regions. If you receive a notice that your plan is leaving, read it carefully and act within the important date it gives you.
To avoid being stuck, write down October 15 on your calendar each year. Many people set a phone reminder in September so they have time to compare plans before the period opens. Even if you are happy with your current plan, it takes only 15 minutes to check whether something better is available in your area.
Special rules for people in institutions or with Medicaid
If you live in a skilled nursing facility, a long-term care facility, or a psychiatric hospital, you can change Medicare Advantage plans once per month instead of once per year. This flexibility exists because people in institutions often have changing care needs and may need to switch to a plan that covers their facility.
If you are enrolled in both Medicare and Medicaid (called "dual may be able to access"), you may have additional enrollment periods tied to Medicaid changes. Some states run their own programs for dual-may be able to access people, and the rules vary. Contact your state Medicaid office or call 1-800-MEDICARE to understand your specific situation.
If you move into an institution or lose Medicaid coverage, that is a may have access to life event, and you have 60 days to make a change. Document the date you moved or the date your Medicaid ended so you can report it accurately to Medicare.
Frequently Asked Questions
Can I change plans more than once during the annual enrollment period?
Yes. You can switch plans multiple times between October 15 and December 7, and your last choice is the one that takes effect on January 1. However, this is not a good strategy — each time you switch, you risk missing important details about your new plan. Choose carefully the first time.
What if my may have access to life event happened more than 60 days ago?
You have missed the special enrollment period and must wait until October 15 to change plans. The 60-day window is firm. If you are in a difficult situation, call 1-800-MEDICARE and explain — they may be able to help, but they cannot extend the important date.
Do I have to switch plans, or can I stay in the same one?
You do not have to switch. If you are happy with your current plan and it is still available in your area, you can keep it. Your coverage continues automatically into the new year unless you actively choose a different plan.
What if my doctor is not in my new plan's network?
Before you enroll in a new plan, use the plan's website or call the plan directly to confirm that your doctors are in the network. If your main doctor is not, you can choose a different plan or ask the plan whether it covers out-of-network care. Do not assume — verify before you enroll.
Can I change from Original Medicare to a Medicare Advantage plan anytime?
No. You can switch between Original Medicare and Medicare Advantage only during the annual enrollment period or if you have a may have access to life event. The same 60-day rule applies if you have a may have access to event. Plan your switch carefully because you cannot undo it until the next enrollment period.