Every fall, thousands of seniors open a letter from their Medicare Advantage insurer and get a knot in their stomach: their plan won’t be offered next year. Maybe the insurer is exiting your county. Maybe they’re merging two plans. Maybe they’re dropping the specific plan you picked years ago. Whatever the reason, the news can feel like the ground shifting under your feet.

Here’s the good news: you are not stuck, and you are not without options. In fact, a plan discontinuation often comes with a special protection that gives you more freedom than you’d normally have. Let’s walk through exactly what to do — in the right order — so you land in a plan that actually works for you in 2027.

First, Understand the Letter You Received

Medicare Advantage plans must notify you in writing if they will not renew your plan for the coming year. You’ll typically get a Notice of Plan Non-Renewal by early fall, well before the Annual Enrollment Period (October 15 – December 7). That letter is not junk mail. It explains the reason for the discontinuation and tells you what will happen if you do nothing.

And doing nothing has a real consequence. If you simply ignore the notice, you may automatically be moved to Original Medicare (Parts A and B) on January 1 — with no Part D drug coverage and no Medigap supplement. That means you’d be responsible for the 20% coinsurance that Original Medicare doesn’t pay, and you’d have no cap on your out-of-pocket drug costs. That’s the exact situation one widely reported case in 2026 describes: a 73-year-old who nearly woke up on January 1 with bare-bones coverage because she set the letter aside.

So the first step is simple: read the letter carefully and note the deadline. Then act.

Know Your Special Enrollment Protection

When your Medicare Advantage plan is discontinued or leaves your service area, Medicare gives you a guaranteed-issue right — sometimes called a guaranteed acceptance period. This is a big deal.

Normally, if you want to leave Medicare Advantage and buy a Medigap (Medicare Supplement) policy, insurers can ask about your health and charge you more — or deny you outright — because of pre-existing conditions. But if your plan is being discontinued, you generally get a guaranteed-issue window of about 63 days to buy any Medigap policy that’s sold in your state, regardless of your health history.

Key things to remember about this window:

• It usually starts when your coverage ends (January 1) or when you receive your non-renewal notice, whichever applies — the rules depend on the type of discontinuation.
• You must apply within the window. Miss it, and you lose the guaranteed-issue protection and could face medical underwriting again.
• Because timing is strict, don’t wait until the last week of December. Start comparing plans now.

Decide: Stay with Medicare Advantage or Move to Original Medicare + Medigap?

This is the real decision point, and it’s personal. Ask yourself a few honest questions:

How much do you use your network? If you love your doctors and they’re in-network on another Medicare Advantage plan in your area, switching to a comparable MA plan may be the simplest path. You can enroll in a new MA plan during the Annual Enrollment Period.

How much do you travel or split time between states? Medicare Advantage plans are usually local. If you spend months in another state, the flexibility of Original Medicare (which works with any provider nationwide who accepts Medicare) plus a Medigap plan may serve you better.

How do you feel about unpredictable costs? Medicare Advantage plans often have low premiums but can carry copays, coinsurance, and annual out-of-pocket maximums that are higher than some people expect. A Medigap plan usually has a higher monthly premium but far more predictable costs — often covering most of what Original Medicare doesn’t.

Is your health stable or changing? If you’re healthy today and the guaranteed-issue window is open, some people choose to lock in a Medigap policy now, while they can’t be denied. Once the window closes, that door may shut.

Your Action Plan for a Smooth Transition

Here’s a checklist to work through over the next few weeks:

1. Read the non-renewal notice and mark the deadline. Note whether you have a guaranteed-issue right and when it expires.
2. List your must-have doctors and medications. Check which plans cover them before you compare prices — a cheap plan that excludes your cardiologist isn’t cheap for you.
3. Compare your options side by side. Look at 2027 Medicare Advantage plans in your county and Medigap plans sold in your state.
4. Check your drug coverage. If you move to Original Medicare, you’ll need a standalone Part D plan. Run your medication list through each plan’s formulary.
5. Enroll in time. Use the Annual Enrollment Period (through December 7) for a new MA or Part D plan, and use your guaranteed-issue window to secure Medigap if that’s your choice.
6. Confirm your coverage in December. Once enrolled, verify your new plan details and that your providers are in-network for the new year.

The Bottom Line

A discontinued Medicare Advantage plan is stressful, but it’s also an opportunity. The guaranteed-issue window is one of the few times you can move to a Medigap policy without answering health questions — and for many seniors, that’s a chance worth taking seriously. The worst move is the one too many people make: ignoring the letter and letting January 1 decide for them.

Take a few hours this month to compare your 2027 options, and you’ll start the new year with coverage you actually chose.

Ready to see what’s available where you live? Get free, no-obligation Medicare Supplement and Medicare Advantage quotes at medigapplanfinders.com and compare plans side by side before your deadline arrives.