Ever Wanted Medigap Plan G? If Your Plan Is Ending, You Have Guaranteed Issue

How a carrier non-renewal notice creates a rare federal Guaranteed Issue window to return to Original Medicare and enroll in Medicare Supplement Plan G without answering medical questions.

By David Huff, licensed Florida health insurance agent #W371813 · Published October 21, 2026

Every year during Annual Enrollment (October 15–December 7), thousands of Florida seniors ask the same question: "Can I switch from my Medicare Advantage plan to a Medicare Supplement (Medigap) Plan G?"

In most normal years, the answer is tough: unless you are in your initial 6-month Medigap Open Enrollment period when you first turned 65, switching from an Advantage plan to Plan G requires passing medical underwriting. If you have been treated for heart conditions, diabetes with insulin, cancer, rheumatoid arthritis, or scheduled joint replacements, insurance companies can legally deny your application or charge higher rates.

However, for 2027, hundreds of beneficiaries across Lakeland, Winter Haven, and Central Florida received an official letter stating that their Medicare Advantage plan contract is ending on December 31. If you hold that letter, the rules change completely.

How a Plan Non-Renewal Triggers Federal Guaranteed Issue Rights

Under federal Medicare law and Florida insurance guidelines, if your Medicare Advantage plan stops offering coverage in your county or service area, you qualify for a federal Medigap Guaranteed Issue right.

Under this federal protection, insurance companies selling Medigap policies to eligible beneficiaries:

• Must offer qualifying Medigap policies (including Plan G for individuals first eligible for Medicare on or after January 1, 2020, or Plan A, B, C, F, K, or L depending on your Medicare eligibility date and carrier availability).
• Cannot deny your application based on your medical history or pre-existing conditions.
• Cannot place waiting periods on pre-existing health conditions.
• Cannot charge you a higher rate because of past or present health problems.

This means a plan termination gives you a protected option to return to Original Medicare and apply for a Medicare Supplement policy without medical underwriting.

Why Beneficiaries Compare Plan G When an Advantage Plan Ends

When an Advantage plan non-renews, you can choose another Medicare Advantage plan or return to Original Medicare with a Medigap policy. Comparing Plan G alongside Original Medicare offers several structural differences:

• Nationwide Medicare Provider Access: See any doctor, specialist, or hospital in the United States that accepts Original Medicare assignment (including participating physicians at Lakeland Regional Health, Watson Clinic, Orlando Health, Moffitt Cancer Center, and Mayo Clinic in Jacksonville) without HMO network referrals.
• Predictable Covered Medical Costs: After you meet the annual Medicare Part B deductible, Plan G pays 100% of Medicare-approved Part A and Part B coinsurance for covered hospital and physician services. (Monthly premiums, separate Part D drug costs, and non-covered services still apply.)
• Rare Prior Authorization Under Original Medicare: Unlike Medicare Advantage plans that apply plan-level prior authorization to many specialist procedures and imaging studies, Original Medicare requires prior authorization only for a limited set of specific services and equipment.

Three Separate Timelines: AEP, Non-Renewal SEP, and the 63-Day Medigap Window

Important Requirement: Pair Medigap with a Standalone Part D Plan

There is one vital step to remember when moving from Medicare Advantage back to Original Medicare with a Medigap policy:

Plan G does not include retail prescription drug coverage.

Because Medicare Advantage plans typically bundle medical and Part D drug coverage into one card, returning to Original Medicare means you need to enroll in a standalone Medicare Part D Prescription Drug Plan (PDP). You can enroll in your standalone Part D plan during Annual Enrollment (October 15–December 7) or use your non-renewal Special Enrollment Period (December 8 through the last day of February)—applying before December 31 ensures your drug coverage starts January 1. Going more than 63 consecutive days without creditable drug coverage can trigger a Part D late-enrollment penalty.

During a plan review, we check your current medications and preferred Polk County pharmacies against the official 2027 Florida Part D formularies so you can compare total estimated annual drug and premium costs.

4 Steps to Use Your Non-Renewal Guaranteed Issue Right

1. Keep your official non-renewal letter: The Medigap insurance company requires a copy of the carrier's official termination or non-renewal notice as proof of your Guaranteed Issue eligibility.
2. Compare Polk County Medigap quotes: Standardized Medigap plans with the same letter offer the same core Medicare-covered medical benefits, while monthly premiums and rating methods vary by insurance company, age, ZIP code, and tobacco status.
3. Select a standalone Part D plan before your coverage ends: Match your prescription list and dosage strengths against 2027 Florida Part D formularies before December 31 for a January 1 start date.
4. Submit your Medigap application with proof of non-renewal: Coordinate your Medigap and Part D effective dates for January 1, 2027 to avoid any gap in coverage.

Related Medicare Guides

• Medicare Supplement (Medigap) in Lakeland, FL: Plan G vs. Plan N & 2027 63-day Guaranteed Issue hub
• My Medicare Advantage plan is ending: what do I do now?
• Medicare Supplement Plan G vs Plan N: Polk County comparison
• Is a Medicare Part B giveback plan worth it in Polk County?
• When can I switch Medicare plans in Florida?
• Medicare Open Enrollment checklist for Polk County
• Medicare broker services in Lakeland

Common questions

Sources