Medicare · Switching
Switching from Medicare Advantage to Medigap — rules, timing, and traps
Medicare Advantage works for many beneficiaries — until it doesn't. Switching back to Original Medicare + Medigap is possible, but the rules and timing matter enormously. Switch wrong and you may not be able to get Medigap coverage at all.
Key takeaways
- You can switch any AEP (Oct 15-Dec 7) or during Medicare Advantage OEP (Jan 1-Mar 31).
- BUT Medigap is medically underwritten in most states — you may be denied or charged more.
- Trial right exception: If you joined MA when first eligible and want to switch back within 12 months, you get guaranteed-issue Medigap.
- Get the Medigap quote first. Don't disenroll from MA until you know you can get Medigap coverage.
When you can switch
Three windows to disenroll from MA and switch to Original Medicare:
- Annual Enrollment Period (AEP): Oct 15 – Dec 7. Coverage change effective Jan 1.
- Medicare Advantage OEP: Jan 1 – Mar 31. One change per year. Effective the 1st of the next month.
- Special Enrollment Period (SEP): Triggered by qualifying events — moving out of plan area, plan terminated, qualifying for Extra Help, etc.
The Medigap trap most people miss
Disenrolling from MA doesn't automatically give you Medigap coverage. Medigap (Medicare Supplement) is sold separately by private insurers, and outside specific protected windows, they can underwrite you medically.
What that means:
- Carriers can review your health history and decline you entirely.
- Carriers can charge you significantly more (50-200%) than standard premium.
- Carriers can exclude pre-existing conditions for up to 6 months.
- If you're already on insulin, in dialysis, or have other ongoing conditions, you may not be able to get Medigap at all.
Your guaranteed-issue rights
Federal law guarantees Medigap acceptance in specific situations:
- First-year MA trial right: If you joined MA the first time you were eligible for Medicare (at 65) and disenroll within 12 months, you have a guaranteed-issue right to certain Medigap plans (A, B, K, L typically; plus G or F for some carriers).
- 5-year switch right: If you originally had Medigap, switched to MA, and want to switch back within 5 years, you can get your old Medigap plan back if available.
- Plan termination: If your MA plan ends or pulls out of your area, you have guaranteed-issue rights for 63 days.
- Moving: Out of your MA plan's service area triggers guaranteed-issue rights.
- State-specific rights: 8 states (CT, MA, ME, MN, MO, NJ, NY, WA) provide additional Medigap protections.
How to make the switch correctly
The right sequence to switch from MA to Original Medicare + Medigap:
- Step 1: Apply for Medigap FIRST (before disenrolling from MA). Get the underwriting decision in writing.
- Step 2: If approved, set the Medigap effective date for the same date your MA disenrollment takes effect (typically Jan 1 if disenrolling during AEP).
- Step 3: Disenroll from MA during AEP or MA OEP. You'll automatically be returned to Original Medicare on the disenrollment date.
- Step 4: Enroll in a standalone Part D drug plan during AEP — you don't get drug coverage automatically when returning to Original Medicare.
- Step 5 (for the careful): Don't actually drop your MA plan if Medigap underwriting denies you — you can decline the Medigap offer and stay in MA. The Medigap application doesn't lock you in.
Why this is one place a broker really helps
MA-to-Medigap switches are one of the few areas in Medicare where DIY can leave you uninsured for a year. A licensed broker can:
- Run multiple Medigap underwriting quotes simultaneously to find your best rate.
- Coordinate Medigap effective date with MA disenrollment so you're never uncovered.
- Identify which Part D plan complements your Medigap choice.
- Document any guaranteed-issue rights you may qualify for.
Common questions
Can I switch from Medicare Advantage to Medigap anytime?
Yes, but Medigap insurers can use medical underwriting outside your initial 6-month Medigap Open Enrollment Period (which begins when you first enroll in Part B at 65 or older). Underwriting can result in denial or higher premiums.
When can I switch without medical underwriting?
Guaranteed-issue rights apply during your Medigap Open Enrollment, your first 12 months in Medicare Advantage (trial right), if your MA plan leaves your area, or in states with year-round guaranteed issue (e.g., NY, CT, MA, ME).
What is the 'trial right' for switching from Advantage to Medigap?
If you enrolled in a Medicare Advantage plan when you first turned 65, you have a 12-month trial right to switch back to Original Medicare and buy any Medigap plan with guaranteed issue.
Which states have year-round Medigap guaranteed issue?
Connecticut, New York, Massachusetts, and Maine offer year-round guaranteed issue. California, Idaho, Illinois, Kentucky, Louisiana, Maryland, Missouri, Nevada, Oklahoma, and Oregon offer 'birthday rule' or annual switch windows.
Questions about your specific situation?
A licensed SilverEdge advisor can walk through your exact options in 15 minutes by phone — free, no pressure.