Can You Switch From Medicare Advantage to a Supplement Plan?

Thinking about leaving Medicare Advantage for a Medigap plan? Here's what Florida seniors need to know about timing, underwriting, and your real options in 2026.

Author: Lynsey Brennan, Licensed Medicare Advisor | FL License #G007269 | Published September 05, 2026 Reading time: 7 min read

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Quick Answer

Yes, you can switch from Medicare Advantage back to Original Medicare and add a Medigap (Medicare Supplement) plan — but the timing and your health status matter a great deal. Outside of a few protected windows, insurers in most states can ask health questions and decline your application based on medical history. Florida follows those same federal underwriting rules, so knowing when to move is critical.

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Key Takeaways

• You can drop Medicare Advantage and return to Original Medicare during Annual Enrollment (Oct 15-Dec 7) or the Medicare Advantage Open Enrollment Period (Jan 1-Mar 31).
• In most states, including Florida, Medigap insurers can use medical underwriting outside of guaranteed-issue windows — meaning a health condition can lead to denial or higher premiums.
• A few life events trigger guaranteed-issue rights, giving you the right to buy a Medigap plan without medical screening.
• Florida Medicare Advantage enrollment sits at 56.1% (CMS Medicare Monthly Enrollment, 2024), so you have plenty of company if you're reconsidering your plan.
• The Medicare Advantage vs. Supplement comparison breaks down the cost and coverage differences side by side if you're still weighing your options.

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Table of Contents

1. Why People Want to Switch 2. When You Can Make the Switch 3. Guaranteed-Issue Rights: The Key Exception 4. Medical Underwriting in Florida 5. What Medigap Actually Covers — and What It Costs 6. The Florida-Specific Picture 7. How to Decide If the Switch Makes Sense for You

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Why People Want to Switch {#why-people-want-to-switch}

Medicare Advantage plans can look attractive when you first enroll — often $0 premiums, built-in drug coverage, dental and vision extras. But circumstances change. A few situations that commonly push people toward Medigap:

• Your doctors left the plan's network. Medicare Advantage plans use HMO or PPO networks. If your specialist or hospital drops out, your costs can spike.
• You've had serious medical bills. Medicare Advantage plans can have an in-network out-of-pocket maximum of up to $9,350 in 2026 (CMS, 2025). If you're hitting that cap, the predictability of Medigap may feel more appealing.
• You're traveling or splitting time between states. Most Medicare Advantage plans don't cover care outside their service area except in emergencies. Medigap typically follows you anywhere Original Medicare is accepted.
• Your plan changed its benefits or network. Plans can and do adjust every year.

None of this means Medigap is automatically better — it has real trade-offs too, which I'll cover honestly below.

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When You Can Make the Switch {#when-you-can-make-the-switch}

You have two main windows each year to drop Medicare Advantage and return to Original Medicare:

Annual Enrollment Period (AEP): October 15 - December 7 This is when most plan changes take effect January 1. You can drop your Advantage plan and return to Parts A and B here.

Medicare Advantage Open Enrollment Period (MA OEP): January 1 - March 31 If you're already in a Medicare Advantage plan, you can switch to a different Advantage plan or drop it and return to Original Medicare. Changes take effect the first of the following month.

Here's the catch: returning to Original Medicare is the easy part. Getting a Medigap policy accepted is a separate application with a separate insurer — and that's where underwriting comes in. See the Medicare enrollment periods guide for a full calendar of when you can make changes.

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Guaranteed-Issue Rights: The Key Exception {#guaranteed-issue-rights}

Certain situations give you a federally protected right to buy a Medigap plan without answering health questions. Insurers cannot deny you or charge you more based on health history during these windows. Common triggers include:

• Your Medicare Advantage plan is leaving your area or losing its Medicare contract
• You move out of the plan's service area
• You joined Medicare Advantage when you first became eligible for Medicare Part B, and you're within your first 12 months — this is sometimes called the "trial right"
• Your employer coverage ends and you're no longer eligible for it

These windows are typically 63 days from the event date. Missing that window means you're likely subject to underwriting. Check Medicare enrollment periods if you think one of these situations applies to you.

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Medical Underwriting in Florida {#medical-underwriting-in-florida}

Florida does not have a continuous open enrollment rule for Medigap (some states do — Minnesota, New York, and a handful of others — but Florida is not among them). Outside of a guaranteed-issue window, a Florida insurer can:

• Ask about your health history on the application
• Decline coverage entirely based on certain conditions
• Charge a higher premium based on your health

Common conditions that may result in denial include diabetes with complications, COPD, heart disease, certain cancers, and kidney disease, though each insurer sets its own underwriting guidelines.

This is why timing matters so much. If you're in good health and considering a switch, acting during a guaranteed-issue window — or sooner rather than later — gives you the best chance at approval and standard pricing. Talk to a licensed Medicare advisor before you disenroll from your Advantage plan, because once you're out, you may not be able to get Medigap coverage if your health has changed.

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What Medigap Actually Covers — and What It Costs {#what-medigap-covers-and-costs}

Medigap plans are standardized by letter (Plan G and Plan N are the most commonly purchased for new enrollees since 2020). They work alongside Original Medicare — Part A and Part B — to cover costs like:

• Hospital coinsurance and extended stay costs
• The Part B coinsurance (usually 20% of outpatient costs)
• Part A deductible

What Medigap does not cover: prescription drugs. You'd need a separate Part D plan for that. Starting in 2025, Part D has a $2,000 annual out-of-pocket cap per the Inflation Reduction Act, and covered insulin is capped at $35/month.

Medigap premiums vary by plan letter, your age, your ZIP code, and the insurer. There's no single price — get quotes from multiple carriers. The plan comparison tool can help you see what's available in your area.

On the cost side, remember you'll also be paying the standard 2026 Part B premium of $185/month and the $257 Part B deductible (CMS, November 2025). Factor those into any comparison. See 2026 Medicare costs for the full breakdown.

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The Florida-Specific Picture {#the-florida-specific-picture}

With 56.1% of Florida Medicare beneficiaries enrolled in Medicare Advantage (CMS Medicare Monthly Enrollment, 2024) — higher than the national average of about 54% (CMS, 2024) — this state has a deeply competitive Advantage market. That means lots of plan options, but also lots of plan instability: networks change, extra benefits shift, formularies get updated every year.

Florida also has a large population of seasonal residents and retirees who travel frequently. For that group, Original Medicare plus a Medigap plan often offers more flexibility than an Advantage plan tied to a local network.

Check the Florida Medicare data page for county-level enrollment figures and plan availability in your area.

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How to Decide If the Switch Makes Sense for You {#how-to-decide}

Ask yourself a few honest questions:

• How is your health? If you're healthy now and could pass underwriting, switching may be more feasible than if you wait.
• How often do you use healthcare? If you rarely see doctors, a $0-premium Advantage plan may still work well. If you have regular specialist visits or ongoing conditions, Medigap's predictability may matter more.
• Can you afford a monthly Medigap premium? Unlike most Advantage plans, Medigap carries a premium every month regardless of use.
• Do you have drug coverage needs? You'd add a Part D plan separately, so account for that cost.
• What matters more — lower monthly cost or predictable annual costs? That's a personal answer, not a universal one.

Read the full Medicare Advantage vs. Supplement breakdown and the Medicare Supplement guide before you decide.

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Frequently Asked Questions

Q: Can I be denied a Medigap plan if I have diabetes or heart disease? A: In Florida, outside of a guaranteed-issue window, yes — insurers can decline your application based on pre-existing conditions. Each insurer sets its own underwriting standards, so some conditions may be declined by one carrier but accepted by another. Working with a licensed Medicare advisor who can shop multiple carriers on your behalf may help.

Q: If I drop Medicare Advantage, do I automatically get Medigap? A: No. Dropping Medicare Advantage returns you to Original Medicare, but Medigap is a separate private insurance policy you apply for independently. Approval is not guaranteed outside of protected enrollment windows.

Q: Can I switch back to Medicare Advantage if Medigap doesn't work out? A: Yes, you can return to Medicare Advantage during the Annual Enrollment Period (Oct 15-Dec 7) or, in some cases, the MA Open Enrollment Period (Jan 1-Mar 31). However, the drug and extra-benefit coverage you gave up may not be identical to what you had before.

Q: Does Florida have any special Medigap rules that help seniors switch? A: Florida does not have a year-round open enrollment rule for Medigap like a few other states do. However, Florida law does provide certain birthday rule protections — you may have a window around your birthday each year to switch Medigap plans with the same or lesser benefits without underwriting. This applies to plan switches, not initial enrollment after Advantage. Confirm current rules with a licensed advisor.

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The Bottom Line

Switching from Medicare Advantage to a Medigap plan is absolutely possible — but the path looks different depending on your health, your timing, and whether you qualify for guaranteed-issue protections. The worst time to explore this is after you've already disenrolled and you're scrambling to find coverage. The best time is before you make any changes, with a clear picture of what you qualify for and what it will cost.

If you're considering a switch — or just want a second opinion on your current plan — I'd be glad to walk through your options with you. Schedule a free Medicare review and let's look at your specific situation together. You can also reach me directly at 561-247-0678.

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Sources

• CMS Medicare Monthly Enrollment, 2024 — Florida and national Medicare Advantage enrollment figures
• CMS, November 2025 — 2026 Part B premium ($185/month) and Part B deductible ($257)
• CMS, 2025 — 2026 Medicare Advantage in-network out-of-pocket maximum cap ($9,350)
• Inflation Reduction Act (IRA) — Part D $2,000 annual out-of-pocket cap (effective 2025); $35/month insulin cap
• CMS Medicare Supplement (Medigap) Policies: federal guidelines on standardized plan letters and guaranteed-issue rights
• Florida Office of Insurance Regulation — Florida Medigap underwriting and birthday rule provisions

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This article is for educational purposes and is not affiliated with or endorsed by the federal Medicare program or any government agency. HealthPlan Connect is a private, licensed Medicare advisory service. FL License #G007269.