Quick Summary:
If you are already enrolled in a Medicare Advantage plan, the Medicare Advantage Open Enrollment Period generally runs from January 1 through March 31 each year. During that time, you may make one change: switch Medicare Advantage plans or leave Medicare Advantage and return to Original Medicare. Any approved change generally takes effect on the first day of the month after the new plan receives your request.
A new calendar year can make it clear that a plan is not meeting your needs. Perhaps a doctor is no longer in-network, a prescription costs more than expected, or the plan’s benefits and rules feel different than you anticipated. The January–March window gives current Medicare Advantage members an opportunity to reassess their coverage without waiting until fall.
What Is the Medicare Advantage Open Enrollment Period?
The Medicare Advantage Open Enrollment Period is a yearly enrollment window for people who are already enrolled in a Medicare Advantage plan, with or without prescription drug coverage. It is different from the fall Medicare Open Enrollment Period, which runs from October 15 through December 7.
From January 1 through March 31, a current Medicare Advantage member can make one coverage change. This period is intended to provide flexibility if your plan is not working as expected after coverage begins on January 1. Insurance and Benefits Resource Group encourages people to focus on how their current coverage works with their actual doctors, prescriptions, budget, and care preferences rather than making a decision based on any one feature alone.
What Changes Can You Make From January Through March?
If you are enrolled in a Medicare Advantage plan, you generally have two options during this period:
- Switch Medicare Advantage plans. You may move from one Medicare Advantage plan to another Medicare Advantage plan, with or without drug coverage, if an available plan serves your area and you meet its enrollment requirements.
- Leave Medicare Advantage and return to Original Medicare. You may disenroll from your Medicare Advantage plan and return to Original Medicare, which includes Part A and Part B. You may also join a separate Medicare drug plan (Part D).
You can make only one change during the Medicare Advantage Open Enrollment Period. For example, if you switch Medicare Advantage plans in February, you generally cannot make another change using this same enrollment period in March.
What You Cannot Do During This Window
The January–March period is not a general opportunity for everyone with Medicare to make coverage changes. If you have Original Medicare, you cannot use this period to join a Medicare Advantage plan. You also cannot use it simply to join or switch a stand-alone Part D prescription drug plan while remaining in Original Medicare.
That distinction matters because Medicare enrollment rules use several different windows. The fall Medicare Open Enrollment Period is broader, while the Medicare Advantage Open Enrollment Period is specifically for people who are already enrolled in Medicare Advantage. Certain life events, such as moving outside a plan’s service area or losing other coverage, may create a Special Enrollment Period with different options and deadlines.
How to Compare Medicare Plans Before Making a Change
If you are considering a Medicare Advantage change plan decision, start by identifying what is not working. A clear list can help you compare coverage consistently instead of reacting to a single frustrating experience.
- Confirm whether your preferred doctors, hospitals, and specialists participate in the plan’s network.
- Review prescription drug formularies, pharmacy networks, deductibles, and expected out-of-pocket costs.
- Compare plan premiums, copayments, coinsurance, annual out-of-pocket limits, and coverage rules.
- Check whether services you expect to use may require referrals, prior authorization, or other plan procedures.
- Consider where you live and travel, since Medicare Advantage plans have service areas and network rules that can affect access to care.
Original Medicare and Medicare Advantage organize coverage differently, so an apples-to-apples comparison is important. If you are thinking about returning to Original Medicare, also review how you would obtain prescription drug coverage and whether you want to explore a Medicare Supplement Insurance (Medigap) policy. Medigap availability, pricing, and protections can depend on your state and personal circumstances. Do not assume that you can buy any Medigap policy without medical underwriting outside of a protected enrollment right or period.
When Would New Coverage Start?
If you switch Medicare Advantage plans or leave Medicare Advantage during the January–March window, your new coverage generally begins on the first day of the month after the plan receives your enrollment request. For instance, a request received in February would generally result in coverage beginning March 1.
Keep records of your enrollment confirmation and verify your effective date before scheduling non-urgent care under the new coverage. If you leave Medicare Advantage and enroll in a separate Part D plan, your Medicare Advantage disenrollment is generally handled as part of that process. Insurance and Benefits Resource Group can help you understand the steps involved, but the decision should reflect your personal coverage needs and eligibility.
Do Not Overlook Your Plan Materials
Your plan’s Annual Notice of Change and Evidence of Coverage can be useful starting points. These materials explain changes in costs, benefits, drug coverage, networks, and plan rules for the new year. Compare them with how you expect to use care in the months ahead.
It is also wise to use Medicare’s plan-comparison resources and contact plans directly with questions about provider participation, covered drugs, and enrollment timing. A provider’s participation can change, so verify with both the plan and the provider’s office before relying on a network listing.
FAQ
Can I switch Medicare Advantage plans after January 1?
Yes. If you are already enrolled in a Medicare Advantage plan, you can generally switch to another Medicare Advantage plan between January 1 and March 31. You may make one change during this period.
Can I leave Medicare Advantage and go back to Original Medicare?
Yes. During the Medicare Advantage Open Enrollment Period, an eligible current Medicare Advantage member may return to Original Medicare and may also join a separate Part D prescription drug plan.
Will my change take effect immediately?
Usually, no. Your new coverage generally begins on the first day of the month after the plan receives your enrollment request. Confirm the effective date with the plan.
Can I enroll in Medicare Advantage if I have Original Medicare?
Not during the January 1–March 31 Medicare Advantage Open Enrollment Period. Other enrollment periods, including the fall Medicare Open Enrollment Period or a qualifying Special Enrollment Period, may provide an opportunity depending on your circumstances.
Should I cancel my current coverage before I enroll in a new plan?
Do not cancel coverage based on an assumption. Review the enrollment process, effective dates, prescription drug coverage, and any Medigap considerations first. For many changes, enrolling in the new coverage initiates the appropriate transition.
Questions about Medicare plans are personal, and the right next step depends on your health care needs, medications, providers, and budget. Request help understanding your Medicare options. Insurance and Benefits Resource Group can provide educational guidance as you review the choices available to you.