What is the cutoff date for changing Medicare plans?

Editorial team Published on

The last day to change Medicare plans during the primary Annual Enrollment Period is December 7.

Key Medicare Change Deadlines

  • Annual Enrollment Period (AEP): October 15 – December 7
    • Anyone with Medicare can join, drop, or switch a Medicare Advantage plan or Part D prescription drug plan. Changes take effect on January 1.
  • Medicare Advantage Open Enrollment Period (OEP): January 1 – March 31
    • If you are already in a Medicare Advantage plan, you can switch to a different Medicare Advantage plan or return to Original Medicare once during this window.
  • Special Enrollment Periods (SEPs): Dates vary
    • If you experience specific life events—such as moving out of your plan's service area, losing other insurance, or qualifying for extra help—you may get a temporary, personalized window to make changes.

Is it too late to change Medicare plans for 2026?

Yes, for standard general enrollment, it is too late to change your Medicare plans for 2026, unless you qualify for a Special Enrollment Period.

Standard Deadlines That Have Passed

  • Annual Open Enrollment Period: Ran from October 15 to December 7, 2025, for general changes taking effect in 2026.
  • Medicare Advantage Open Enrollment Period: Ran from January 1 to March 31, 2026, allowing adjustments if you already had a Medicare Advantage plan.

When You Can Still Change Plans

You might still be able to change your coverage right now if you qualify for a Special Enrollment Period (SEP). Common qualifying life events include:

  • Moving out of your plan’s service area.
  • Losing other health coverage (such as job-based insurance).
  • Qualifying for Extra Help or Medicaid assistance.
  • Joining a 5-star rated Medicare plan.
  • Enrolling in a Special Needs Plan (SNP) if you meet specific chronic or institutional requirements.

Can I switch back onto regular Medicare and cancel Medicare Advantage?

Yes, you can cancel your Medicare Advantage plan and switch back to Original Medicare, but you can usually only make this change during specific enrollment windows.

When You Can Switch

  • Medicare Open Enrollment Period (October 15 – December 7): Changes made during this time take effect on January 1 of the following year.
  • Medicare Advantage Open Enrollment Period (January 1 – March 31): If you already have Medicare Advantage, you can switch to Original Medicare during this window, and your coverage starts the first of the month after your request is received.
  • Special Enrollment Periods: You may qualify to switch at other times if you experience specific life events, such as moving out of your plan's service area or your plan terminating its contract. You can review details on Special Enrollment Periods to see if you qualify.

How to Cancel and Switch

  • Enroll in a new plan: You can call 1-800-MEDICARE (1-800-633-4227) for live assistance to disenroll from your Advantage plan and return to Original Medicare. Alternatively, enrolling in a standalone Medicare Part D prescription drug plan will automatically disenroll you from your Medicare Advantage plan.
  • Contact your plan: You can also call your current Medicare Advantage provider directly to request cancellation before setting up your Original Medicare and Part D coverage.

Important Considerations

  • Prescription Coverage: Original Medicare does not include prescription drug coverage, so you will likely want to sign up for a separate Part D plan.
  • Medigap (Supplement Insurance): Original Medicare leaves you responsible for about 20% of medical costs. While you may want a Medigap policy to cover these costs, keep in mind that outside of a trial period or specific guaranteed-issue rights, most states allow insurance companies to use medical underwriting, meaning they can deny coverage or charge higher rates based on your health.

Is there a penalty for switching Medicare plans?

There is no direct financial penalty for switching Medicare plans as long as you make the change during an approved enrollment period.

When Penalties Can Happen

  • Part D Drug Coverage Gap: If you switch from a Medicare Advantage plan that includes prescription drug coverage back to Original Medicare, you must sign up for a stand-alone Part D plan. If you go 63 days or more without creditable prescription drug coverage, you will face a Part D late enrollment penalty.
  • Missing Enrollment Windows: You can only switch during official windows like the Annual Enrollment Period (October 15 – December 7), the Medicare Advantage Open Enrollment Period (January 1 – March 31), or a qualifying Special Enrollment Period. Switching outside these times without a qualifying life event is generally not allowed.
  • Medigap Underwriting: While not a direct fee or penalty, switching your supplemental (Medigap) coverage outside of your initial eligibility period may require medical underwriting, meaning an insurance company can charge you more or deny coverage based on your health history.

What is the deadline for choosing a Medicare plan?

The deadline for everyone with Medicare to change their health or drug plans for the following year is December 7 during the Annual Enrollment Period, which runs from October 15 to December 7.

Key Medicare Deadlines

  • Annual Enrollment Period: October 15 – December 7. Anyone with Medicare can join, switch, or drop a Medicare Advantage plan or prescription drug plan. Changes start on January 1.
  • Medicare Advantage Open Enrollment Period: January 1 – March 31. If you already have a Medicare Advantage plan, you can switch to a different one or return to Original Medicare once during this window.
  • Initial Enrollment Period: A 7-month window around your 65th birthday (3 months before, the month you turn 65, and 3 months after) to sign up for Medicare the first time.
  • Special Enrollment Periods: Available at specific times outside these standard dates if you have major life changes, like moving, losing other insurance, or qualifying for Medicaid.

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9 related questions found

What months can you switch Medicare plans?

You can switch Medicare plans during specific enrollment periods each year or when you experience certain life changes.

Yearly Enrollment Periods

  • October 15 to December 7: The Medicare Open Enrollment period lets anyone with Medicare switch between Original Medicare and a Medicare Advantage plan, change Medicare Advantage plans, or change prescription drug plans. Changes start on January 1.
  • January 1 to March 31: The Medicare Advantage Open Enrollment Period lets people already in a Medicare Advantage plan switch to a different Medicare Advantage plan or return to Original Medicare.

Special Enrollment Periods

  • Qualifying Life Events: You can change plans outside the yearly windows if you move outside your plan's area, lose other health coverage, or qualify for help with costs. Your chance to switch usually lasts for 2 months after the event.
  • Five-Star Plans: You can switch to a higher-rated five-star Medicare Advantage plan in your area at any time during the year.

What is the most highly rated medicare supplement plan?

Medigap Plan G is widely considered the most popular and comprehensive highly rated Medicare supplement plan available to new enrollees.

Because Medicare supplement (Medigap) benefits are strictly standardized by the government, a Plan G from one private insurance company provides the exact same core medical coverage as a Plan G from any other company. Ratings and "best plan" distinctions instead apply to the specific insurance carriers offering them based on cost, customer satisfaction, and stability of rate increases.

Top-Rated Insurance Carriers for Medigap Plans

  • State Farm: Frequently ranks highest for overall customer satisfaction and slow, stable rate increases over time.
  • AARP / UnitedHealthcare: The largest Medigap provider nationwide, recognized for massive enrollment numbers, wide availability, and extra member perks.
  • Mutual of Omaha: Consistently praised for strong financial stability, high customer satisfaction, and fast claim processing.
  • HealthSpring (formerly Cigna): Noted for having some of the most competitive, low initial monthly premiums on the market.

What Medigap Plan G Covers

  • 100% of Part A coinsurance, hospital costs, and hospice care.
  • 100% of Part B copayments or coinsurance.
  • The Part A deductible.
  • The only major item it does not cover is the annual Medicare Part B deductible ($283 in 2026), which you must pay out-of-pocket before coverage kicks in. (Note: Plan F covers this deductible too, but is legally closed to anyone who became eligible for Medicare on or after January 1, 2020).

What is the biggest mistake seniors make when enrolling in Medicare?

The biggest mistake seniors make when enrolling in Medicare is missing key enrollment deadlines, which can lead to permanent, lifelong late-enrollment penalties and gaps in medical coverage.

Top Medicare Enrollment Mistakes

  • Missing the Initial Enrollment Period (IEP): Your window to sign up is a 7-month period that starts 3 months before the month you turn 65, includes your birthday month, and ends 3 months after. Missing this window without qualifying for a special enrollment period leads to delays and penalties.
  • Failing to Understand Work Rules: Many seniors either sign up for Part B when they don't need to (because they are still working and covered by an employer with 20 or more employees) or fail to realize they must sign up when they retire, missing their 8-month special window.
  • Ignoring Prescription Drug Coverage (Part D): Failing to sign up for Part D when first eligible—even if you take no medications—can trigger a permanent 1% penalty added to your monthly premium for every month you delayed.
  • Confusing Advantage and Supplement Plans: Assuming a low-premium Medicare Advantage plan always means lower overall out-of-pocket costs without checking network restrictions, copays, and prior authorization rules. You can read more details on avoiding these errors via the AARP Medicare Guide.

Why do people say to stay away from Medicare Advantage plans?

Critics and beneficiaries advise caution with Medicare Advantage plans because of restrictions on care, unexpected costs, and administrative hurdles. While these private plans often feature low or zero monthly premiums and extra perks like dental or vision, they come with significant trade-offs.

Restricted Provider Networks

  • Local limitations: Most plans use specific HMO or PPO networks, meaning you must see doctors and go to hospitals within the plan’s local area.
  • No nationwide freedom: Unlike Original Medicare, which lets you see any accepting doctor nationwide, Medicare Advantage offers very limited coverage when traveling.
  • Frequent changes: Provider lists can change annually or even during the year, meaning your favorite doctor might leave the network unexpectedly.

Prior Authorization and Denials

  • Approval delays: Private insurers often require "prior authorization" (advance permission) for specialized care, MRIs, surgeries, or rehabilitation.
  • Care obstacles: This review process can delay or block medically necessary treatments.

High Out-of-Pocket Costs

  • Cost-sharing for serious illnesses: While plans have annual out-of-pocket maximums (up to thousands of dollars), treatments like chemotherapy or expensive infusions can trigger steep 20% coinsurance charges before you reach that cap.
  • End-of-life complications: High utilization during severe or chronic illness can result in major expenses or coverage friction.

The "Medigap" Trap

  • Locked-in coverage: If you try to switch back to Original Medicare after a 12-month trial period, moving to a Medicare Supplement (Medigap) plan often requires passing medical underwriting. Pre-existing health conditions can make it difficult or impossible to qualify for a good supplement later.

Is it better to have straight Medicare or a Medicare Advantage plan?

Neither option is universally "better"; Original Medicare (straight Medicare) and Medicare Advantage suit different health needs, budgets, and preferences.

To decide which is right for you, compare how each option handles key factors:

Original Medicare (Parts A and B)

  • Doctor Choice: You can see any doctor or go to any hospital in the U.S. that accepts Medicare. You do not need referrals to see specialists.
  • Approvals: You rarely need prior authorization or permission from an insurance company for tests or treatments.
  • Costs: It does not have an annual out-of-pocket maximum unless you buy a separate Medigap (Medicare Supplement) policy.
  • Extras: It does not cover prescription drugs (you need a separate Part D plan) or routine dental, vision, and hearing.

Medicare Advantage (Part C)

  • All-in-One Bundles: These private plans combine Part A, Part B, and usually Part D (prescription drugs), often with low or zero monthly premiums.
  • Extra Benefits: They frequently include routine dental, vision, hearing, and gym memberships.
  • Financial Protection: They include a mandatory annual out-of-pocket spending cap (capped at $9,250 for in-network care).
  • Restrictions: You are usually limited to local provider networks (like HMOs or PPOs), and you may need referrals or prior authorization for care.

Which Should You Choose?

  • Choose Original Medicare (with Medigap) if you travel often within the U.S., want the freedom to see any specialist without a referral, and prefer predictable medical bills with fewer coverage denials.
  • Choose Medicare Advantage if you want lower monthly premiums, extra perks like dental or vision care, and a hard cap on your yearly out-of-pocket costs, and you are comfortable using a specific local network of doctors.

You can compare specific local options using the official Medicare Plan Finder.