Got a Plan Exit Letter? What to Do If Your Medicare Advantage Plan Is Ending

Every fall, some Medicare Advantage insurers decide to stop offering certain plans — or to pull out of a county entirely. For 2026, that happened on an unusually large scale. Industry analyses estimate that roughly one in ten Medicare Advantage members with drug coverage were in a plan that was terminated for the coming year, affecting millions of people who were not automatically moved to a replacement plan.

If you opened your mailbox and found a letter saying your plan is "non-renewing" or "no longer available in your area," take a breath. This is common, it is not a mistake, and you have clear rights and a set timeline to act. This guide walks through exactly what the letter means and what to do next.

What a Plan Exit Letter Is

A plan exit letter — formally called a plan non-renewal notice — is a required notice your insurer sends when it will not renew your specific Medicare Advantage or Part D plan for the next year. Medicare requires these notices to go out by early October so you have time to choose new coverage before your current plan ends on December 31.

There are a few versions of this news you might receive:

• Plan non-renewal — your exact plan is being discontinued, even though the insurer may still offer other plans.
• Service area reduction — the insurer is pulling the plan out of your county or region.
• Full market exit — the insurer is leaving Medicare Advantage in your area altogether.

In all of these cases, the key fact is the same: your current coverage ends at year-end, and you are generally not enrolled in a replacement plan automatically. You need to make an active choice.

Why So Many Plans Are Leaving

You did nothing wrong, and it is not about you personally. Insurers regularly adjust which plans they offer based on costs, provider contracts, and federal payment changes. In some years — like 2026 — a combination of rising medical costs, hospital contract disputes, and tighter margins leads several carriers to trim or exit plans at once. The result is more non-renewal letters than usual, but the same protections apply to you.

Your Three Options

When your plan ends, you generally have three paths. There is no single right answer — it depends on your doctors, your prescriptions, your budget, and how much flexibility you want.

Option 1: Enroll in a new Medicare Advantage plan

You can choose another Medicare Advantage plan in your area, ideally one that keeps your doctors in network and covers your medications. This is often the simplest move if you are happy with the Medicare Advantage structure and just need a new plan.

Option 2: Return to Original Medicare and add a Part D drug plan

You can go back to Original Medicare (Parts A and B) and pair it with a standalone Part D prescription drug plan. Original Medicare lets you see any provider nationwide that accepts Medicare, without network restrictions.

Option 3: Return to Original Medicare and add a Medigap policy

For the most predictable out-of-pocket costs, many people pair Original Medicare with a Medicare Supplement (Medigap) policy plus a Part D plan. Medigap helps cover the deductibles and coinsurance Original Medicare leaves behind. The important part — covered below — is that a plan termination often gives you the right to buy Medigap without health questions.

Your Special Enrollment Period

When your plan non-renews, Medicare gives you a Special Enrollment Period (SEP) so you are not stuck. For a plan that ends at the close of the year, this SEP generally runs from December 8 through the end of February. That is on top of the regular Annual Enrollment Period (October 15 to December 7).

The practical takeaway: you have time, but not unlimited time. Acting during the Annual Enrollment Period or in early December gives you the cleanest January 1 start.

The Guaranteed-Issue Medigap Window Most People Miss

Here is the protection that often goes unused. Normally, once you are past your first six months on Medicare Part B, an insurer can review your health history before selling you a Medigap policy — and can charge more or decline you. But when your Medicare Advantage plan terminates and you return to Original Medicare, you usually get a guaranteed-issue right to buy certain Medigap plans.

Guaranteed issue means the insurer:

• Cannot turn you down because of pre-existing conditions
• Cannot charge you a higher premium based on your health
• Cannot make you wait to cover a pre-existing condition

This window is time-limited — generally about 63 days around when your coverage ends. The specific Medigap plans you can buy under guaranteed issue depend on the rules in effect and on when you first became eligible for Medicare (for example, Plans C and F are generally available only to people who were eligible for Medicare before 2020). Because the details matter and the clock is ticking, this is a good moment to talk with a licensed advisor.

What to Do Right Now

A simple order of operations:

1. Keep the letter. Note the date your coverage ends (almost always December 31).
2. List your must-keeps. Write down your doctors, hospitals, and prescriptions so any new plan can be checked against them.
3. Decide the structure — another Medicare Advantage plan, or Original Medicare with Part D (and possibly Medigap).
4. Act during the enrollment window so your new coverage starts January 1 with no gap.
5. Ask about guaranteed-issue Medigap if you are leaning toward Original Medicare — that window will not stay open.

If you would like help sorting through it, a licensed Medicare advisor can review the plans available where you live, explain your Medigap rights, and make sure you do not miss a deadline. There is never a cost to you for that guidance.