Medicare Advantage Open Enrollment: Your January-March Choices

The Medicare Advantage Open Enrollment Period runs from January 1 to March 31 each year. During this time, if you already have a Medicare Advantage plan, you can make one change: switch to another Medicare Advantage plan or switch back to Original Medicare. If you return to Original Medicare, you can also join a stand-alone Medicare Part D drug plan.

Key takeaways

• The Medicare Advantage Open Enrollment Period (MA OEP) is from January 1 to March 31.
• It is for people already enrolled in a Medicare Advantage plan.
• You can switch to a different Medicare Advantage plan or return to Original Medicare.
• If returning to Original Medicare, you can add a stand-alone Part D plan.
• This period does not allow people with Original Medicare to join a Medicare Advantage plan.

What is the Medicare Advantage Open Enrollment Period?

The Medicare Advantage Open Enrollment Period (MA OEP) happens every year from January 1 to March 31. This is a special time for people who are already in a Medicare Advantage (Part C) plan. It gives you a chance to make a change early in the year if your current plan is not meeting your needs.

During this three-month window, you have specific options. You can switch from your current Medicare Advantage plan to a different Medicare Advantage plan offered in your area. You can also decide to leave your Medicare Advantage plan and go back to Original Medicare (Part A and Part B).

If you choose to return to Original Medicare, you can then enroll in a stand-alone Medicare Part D prescription drug plan. This helps ensure you still have coverage for your medications. This period is designed to offer flexibility after the Annual Open Enrollment Period ends on December 7.

Who can use the Medicare Advantage Open Enrollment Period?

This enrollment period is specifically for people who are currently enrolled in a Medicare Advantage plan. This includes plans that cover just medical services (MA) or those that combine medical and prescription drug coverage (MA-PD). If you have Original Medicare, you cannot use this period to join a Medicare Advantage plan.

It also applies to those who recently joined a Medicare Advantage plan for the first time. For example, if you enrolled in a Medicare Advantage plan during your Initial Enrollment Period, you can use the MA OEP. This allows you to make an adjustment if your first choice does not feel right after you start using it.

This period is not for everyone. If you have Original Medicare and want to switch to Medicare Advantage, you typically need to wait for the Annual Open Enrollment Period from October 15 to December 7. The MA OEP is a specific window for current Medicare Advantage plan members to make certain changes.

What changes can you make during this period?

The MA OEP allows for one primary type of change. You can switch from your current Medicare Advantage plan to another Medicare Advantage plan. For example, you might switch from an HMO (Health Maintenance Organization) plan to a PPO (Preferred Organization Organization) plan, or simply to a different HMO plan with a better fit. You might also want to change plans to get different benefits or lower costs.

Another key option is switching from your Medicare Advantage plan back to Original Medicare. If you choose this path, you will then have basic Medicare Part A (hospital insurance) and Part B (medical insurance). Medicare Part A has a 2026 deductible of $1,736 per benefit period. Part B has a 2026 standard premium of $202.90 per month, and a deductible of $283 per year.

If you switch back to Original Medicare, you can also join a stand-alone Medicare Part D prescription drug plan. This ensures your medications are covered. You cannot use this period to switch from one stand-alone Part D plan to another if you already have Original Medicare. This specific period focuses on changes related to Medicare Advantage plans, not just Part D.

What you cannot do during MA OEP

It's important to know what you cannot do during this time. You cannot switch from Original Medicare to a Medicare Advantage plan. This period is not for those who want to enroll in Medicare Advantage for the first time, unless they are already in an MA plan and switching.

You also cannot switch from one stand-alone Part D plan to another if you have Original Medicare. This period is specifically for those leaving or changing a Medicare Advantage plan. You cannot use it to join a Part D plan if you only have Original Medicare and no drug coverage. For most other changes, like choosing a Medigap policy, you might need a different enrollment period. You can learn more about these windows in "Medicare Enrollment Periods: Don't Miss These Deadlines."

Why might you use the Medicare Advantage Open Enrollment Period?

People use the MA OEP for several reasons. Perhaps your current Medicare Advantage plan is no longer working for you. Your doctors might have left the plan's network. Your out-of-pocket costs, like copays or deductibles, may have become too high for your budget. Or, you might find that the plan's benefits are not as useful as you expected.

Another common reason is if you enrolled in a Medicare Advantage plan during the Annual Open Enrollment Period (October 15 – December 7) and now have "buyer's remorse." You might realize the plan you chose does not cover all your prescriptions or does not include your preferred hospital. The MA OEP gives you a second chance to get into a plan that suits your needs better.

Some people simply decide they prefer Original Medicare. They might want the freedom to see any doctor or hospital that accepts Medicare, without network restrictions. If you switch back to Original Medicare, remember to consider a Medigap policy. These help cover costs Original Medicare doesn't, like the 20% coinsurance for most Part B services. Your ability to get a Medigap policy without health questions may be limited outside of specific enrollment windows, such as your one-time six-month Medigap Open Enrollment Period. More details are in "Your One-Time Medigap Open Enrollment: Why This 6-Month Window Matters."

How does MA OEP compare to other enrollment periods?

The Medicare has several enrollment periods, and it helps to know how they differ. The Annual Open Enrollment Period (AEP), also called the Medicare Annual Election Period, runs from October 15 to December 7 each year. During AEP, anyone with Medicare can make many changes: switch between Original Medicare and Medicare Advantage, switch Medicare Advantage plans, join or switch Part D plans, and more. Changes made during AEP take effect on January 1.

The Medicare Advantage Open Enrollment Period (MA OEP) is shorter, from January 1 to March 31. It has more limited options, specifically for those already in Medicare Advantage. You can switch MA plans or switch to Original Medicare plus a Part D plan. It does not allow switching from Original Medicare to Medicare Advantage.

Your Initial Enrollment Period (IEP) is when you first become eligible for Medicare. It is a 7-month window: the 3 months before your 65th birthday month, your birthday month, and the 3 months after. During your IEP, you can enroll in Part A, Part B, Part C (Medicare Advantage), and Part D. If you join a Medicare Advantage plan during your IEP, you can still use the MA OEP later if you need to make changes. Understanding your IEP is key, as explained in "Understanding Your Medicare Initial Enrollment Period (IEP)."

Comparison of key enrollment periods

This table shows that the MA OEP offers specific, more limited flexibility compared to the broader choices available during the AEP. The MA OEP is a targeted opportunity for Medicare Advantage members.

What happens after you make a change?

If you make a change during the Medicare Advantage Open Enrollment Period, your new coverage typically begins the first day of the month after your new plan receives your enrollment request. For example, if you enroll in a new Medicare Advantage plan on February 15, your new plan would usually start on March 1. It is important to confirm the effective date with your new plan.

When you switch from one Medicare Advantage plan to another, your old plan's coverage ends when your new plan's coverage begins. This ensures there is no gap in your Medicare Advantage coverage. The new plan will send you a welcome kit with your new plan details, member ID card, and network information, usually within 10 business days.

If you switch from a Medicare Advantage plan back to Original Medicare, your Medicare Advantage plan coverage will end. You will then have Original Medicare. If you also enroll in a stand-alone Part D plan, that coverage will begin on the same day as your return to Original Medicare. Always check with your new plan or Medicare.gov to confirm your effective dates and avoid any gaps in coverage.

Important considerations before making a switch

Before making any change during the MA OEP, take time to review your options carefully. Consider your current health needs and what you expect from your health insurance. Think about your doctors and specialists: will they be in the network of the new Medicare Advantage plan? If you switch to Original Medicare, will your doctors accept Medicare?

Examine your prescription drug needs. If you switch to a new Medicare Advantage plan with drug coverage (MA-PD), check its formulary (list of covered drugs) to ensure your medications are included. If you switch back to Original Medicare and add a stand-alone Part D plan, compare formularies and costs carefully. The 2026 maximum Part D deductible is $615, though many plans charge less.

Also, consider the costs involved. Look at monthly premiums, deductibles, copayments, coinsurance, and the annual out-of-pocket maximums. A Medicare Advantage plan's out-of-pocket maximum helps limit your spending for covered services. The 2026 Part D annual out-of-pocket cap is $2,100, after which your plan pays 100% of covered drugs. Compare these costs across different plans to find one that fits your budget and health care usage. Medicare.gov is an excellent resource for comparing plans, and details vary by location and carrier.

Special rules for people with Extra Help or Medicaid

People who receive Extra Help (the Low-Income Subsidy) to pay for Part D prescription drug costs have more flexibility. Since January 1, 2025, if you have Extra Help or Medicaid, you get a Special Enrollment Period once per calendar month. This allows you to switch into a stand-alone Part D drug plan. You can use it to switch drug plans, or to leave a Medicare Advantage plan for Original Medicare plus a stand-alone drug plan.

This monthly Special Enrollment Period does not allow you to join or switch Medicare Advantage plans directly. However, if you have full Medicaid, you may also switch once a month into an integrated Dual Eligible Special Needs Plan (D-SNP) run by the same company as their Medicaid plan. These special rules provide more opportunities for beneficiaries with limited incomes to ensure they have suitable drug coverage for their situation.

If you qualify for Extra Help, your copays for prescription drugs are much lower. In 2026, they are at most $5.10 for a generic drug and $12.65 for a brand-name drug. For those with lower incomes and limited resources, Extra Help can make prescription drugs much more affordable. You can check if you qualify for Extra Help through the Social Security Administration, and some income and resources do not count.

Avoiding late enrollment penalties

Making changes during the MA OEP typically does not lead to late enrollment penalties, as you are already enrolled in Medicare Part A and Part B. However, it's important to understand how penalties work, especially for Part D. If you switch from a Medicare Advantage plan that includes drug coverage (MA-PD) back to Original Medicare and do not enroll in a stand-alone Part D plan promptly, you could face a penalty.

The Medicare Part D late enrollment penalty is permanent. It is added to your monthly Part D premium if you go 63 days or more in a row without Medicare drug coverage or other creditable drug coverage after your Initial Enrollment Period. The penalty is 1% of the national base beneficiary premium for each full month you went without coverage, rounded to the nearest $0.10. For 2026, the national base beneficiary premium is $38.99.

For example, if you had 14 full months without creditable drug coverage, your penalty in 2026 would be 14% of $38.99, which is about $5.46, rounded to $5.50 a month. This penalty is added to your Part D premium for as long as you have Medicare drug coverage. People who get Extra Help do not pay a Part D late enrollment penalty.

Getting help with your choices

Navigating Medicare enrollment periods and plan choices can feel complex. There are many resources available to help you make informed decisions. Medicare.gov is the official government website and offers a plan finder tool where you can compare plans available in your area.

You can also call Medicare directly at 1-800-MEDICARE (1-800-633-4227). This line is available 24 hours a day, 7 days a week, and can provide unbiased information about your options. TTY users can call 1-877-486-2048.

State Health Insurance Assistance Programs (SHIPs) offer free, personalized counseling to people with Medicare. These programs are independent and can help you understand your choices and rights. You can find your local SHIP program by visiting shiptacenter.org or by calling 1-800-MEDICARE.

Licensed insurance agents can also help you understand different Medicare Advantage plans and their benefits. They can explain how various plans work and assist you in comparing options based on your specific health and financial situation. Remember to ask questions until you feel comfortable with your choice.

Final thoughts on the MA OEP

The Medicare Advantage Open Enrollment Period is a valuable opportunity for those already in a Medicare Advantage plan. It provides a specific window each year to ensure your coverage aligns with your changing needs. Whether you decide to switch to a different Medicare Advantage plan or return to Original Medicare, this period offers flexibility.

Taking the time to review your options, compare plans, and understand the implications of any change can help you choose the right coverage. Always consider your doctors, prescription drugs, and overall health care costs. Making an informed decision during the MA OEP can lead to greater peace of mind with your Medicare coverage throughout the year.

Remember that while this period is useful, it has specific limitations. It is not a general open enrollment for everyone on Medicare. For most broad changes, the Annual Open Enrollment Period (October 15 – December 7) is the time for action. Use the MA OEP wisely if you are currently in a Medicare Advantage plan and need to make a mid-year adjustment. Your health coverage is important, so choose carefully.

Have questions? Call 1-877-443-3251 to talk it through with a licensed insurance agent. They're paid by the plans they represent, never by you, and the decision stays yours.

We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. Medicare has neither reviewed nor endorsed this information.