Switching From Medicare Advantage to Medigap: What to Know

# Switching From Medicare Advantage to Medigap: What to Know

People switch from Medicare Advantage to Original Medicare with a Medigap supplement for many reasons — dissatisfaction with network restrictions, a new address outside the plan's service area, or a preference for broader provider access. Whatever the reason, the switch is possible, but it's not as simple as canceling one plan and enrolling in another. Medical underwriting, specific timing windows, and guaranteed-issue rights all shape whether you can make the move and what it will cost you.

Why Medical Underwriting Is the Central Concern

When you first became eligible for Medicare and enrolled in Part B, you had a six-month Medigap Open Enrollment Period during which insurers were required to sell you any Medigap plan at standard rates, regardless of health history. That window is behind you if you've been on Medicare Advantage for any length of time.

Outside of guaranteed-issue rights, Medigap insurers in most states can use medical underwriting — reviewing your health history, pre-existing conditions, and current medications — to decide whether to sell you a policy and at what price. They can decline you or charge more than a healthier applicant would pay. Conditions common among Medicare-age beneficiaries — diabetes, heart disease, COPD, prior cancer — can complicate approval. If a guaranteed-issue right is available, it bypasses underwriting entirely; if not, coverage is not guaranteed.

Guaranteed-Issue Rights That Protect You

Federal law establishes specific situations in which Medigap insurers must sell you a policy without underwriting. These are called guaranteed-issue rights, and they exist for people switching from Medicare Advantage under certain circumstances:

• New to Medicare Advantage: If you enrolled in a Medicare Advantage plan when you first became eligible for Medicare and you decide to leave it within the first year, you have a guaranteed-issue right to purchase a Medigap plan during that trial period.
• Plan leaves your area or terminates: If your Medicare Advantage plan stops being offered in your service area, or leaves the Medicare program entirely, you have a guaranteed-issue right to switch to Original Medicare and purchase a Medigap plan.
• Moving out of the service area: If you permanently move to an area your plan does not serve, a guaranteed-issue right typically applies.

Some states offer additional protections beyond the federal baseline — "birthday rules" or similar provisions that allow beneficiaries to switch Medigap plans with limited underwriting during an annual window. Confirming whether your state has these expanded rights is worth doing before assuming the federal rules are your only option.

The Step-by-Step Process for Switching

Switching from Medicare Advantage to Medigap involves several moving parts that need to happen in the right sequence to avoid gaps in coverage.

• Step 1 — Confirm your enrollment window. The Medicare Advantage Open Enrollment Period (January 1–March 31) and the Annual Enrollment Period (October 15–December 7) are the two primary windows. Changes take effect the first of the month after your request is processed.
• Step 2 — Apply for Medigap before disenrolling. Because underwriting can result in a denial, apply while still enrolled in your Advantage plan so approved coverage is in place before your Advantage coverage ends.
• Step 3 — Secure Part D coverage. If your Advantage plan included drug coverage, you'll need a standalone Part D plan when you return to Original Medicare or you risk a late enrollment penalty.
• Step 4 — Notify your Advantage plan. Once your Medigap application is approved, follow the plan's process to formally disenroll.

Timing these steps correctly is where an independent advisor adds real value, especially if health conditions complicate underwriting.

What to Expect From the Underwriting Process

Without a guaranteed-issue right, insurers will review your medical history, current medications, diagnoses, and hospitalizations. Underwriting standards vary — some carriers are more flexible about specific conditions — so applying to multiple companies often produces better results than submitting a single application. A denial from one carrier does not mean all will decline you.

• Be honest and thorough on your application — misrepresentation can result in a policy being voided.
• Ask about any waiting periods for pre-existing conditions if you are approved.
• Confirm the premium structure: some carriers use age-attained pricing (premiums rise as you age) while others use issue-age or community-rated pricing.

Frequently Asked Questions

Q: Can I switch from Medicare Advantage to Medigap at any time of year? A: Generally no. Most switches require you to act during the Medicare Advantage Open Enrollment Period (January 1–March 31) or the Annual Enrollment Period (October 15–December 7), unless you have a qualifying Special Enrollment Period triggered by a life event such as your plan leaving your area. Switching outside these windows without a qualifying event is typically not permitted.

Q: If I'm denied Medigap coverage due to underwriting, what are my options? A: You can apply to other Medigap carriers, as underwriting standards vary. You can also remain on your Medicare Advantage plan and revisit the switch during a future enrollment period if your circumstances change. In some states, additional consumer protections may provide more opportunities. Consulting an independent advisor familiar with carrier-specific underwriting can help you identify the most viable path.

Q: Will switching back to Original Medicare affect my Part D drug coverage? A: Yes. If your Medicare Advantage plan included prescription drug coverage — which most do — that coverage ends when you leave the plan. You'll need to enroll in a standalone Medicare Part D plan to maintain drug coverage. Acting promptly is important, as delays can trigger a late enrollment penalty that increases your Part D premiums permanently.

Have questions about your Medicare options? Lynsey Brennan (FL License #G007269) offers free consultations in FL, TX, AZ, GA, NC, SC, PA, OH, TN, VA. Call (561) 735-1490 or book online.

We do not offer every plan available in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.