If you are enrolled in a Medicare Advantage plan, the letter in your mailbox this fall may not be a renewal notice. It may be a termination notice.

Humana recently confirmed it is exiting hundreds of thousands of Medicare Advantage plan memberships for the 2027 plan year — one of the largest single plan pullbacks in the program’s history. And Humana is not alone. Industry data shows that being involuntarily disenrolled from a Medicare Advantage plan, once a roughly 1% event year after year, climbed to around 10% in 2026. Federal rules require plans to notify affected members by October 2 for the following year.

That means millions of seniors will be shopping for new coverage this fall, often with less guidance than they expected. Here is what is happening, and a step-by-step plan to protect your doctors, your prescriptions, and your budget.

Why Medicare Advantage Plans Are Pulling Out

Medicare Advantage plans are paid a fixed amount per member, and plans lose money in counties where they cannot manage costs well enough. Several factors have squeezed plan margins: rising medical utilization, higher drug costs, changes to risk-score calculations, and tighter Star Ratings that cut into bonus payments.

When a plan cannot make the math work in a market, it has three options: raise premiums and cost-sharing, cut benefits, or leave the market entirely. Increasingly, insurers choose the third option in specific counties while expanding in others. That is why one insurer may leave your county while a competitor mails you a glossy brochure the same week.

The practical takeaway: an exit is a business decision, not a verdict on your health. Treat it as a signal to review your coverage deliberately.

First: Confirm Whether You’re Actually Affected

Termination notices are required to be clear, but they are often buried in fine print. Check for these three things:

1. The words “non-renewal” or “plan termination.” A plan that is not renewing is not the same as a plan that is changing benefits. Only a non-renewal forces you to find new coverage.

2. The effective date. Most non-renewals take effect January 1. Your notice must tell you the last day of coverage.

3. Whether you have a guaranteed issue right. This is the most important and most overlooked item. When a Medicare Advantage plan leaves your service area or terminates its contract, federal law typically gives you a guaranteed issue right to buy certain Medigap policies without health questions — even in states that normally allow underwriting.

If your notice does not explain your guaranteed issue rights, call 1-800-MEDICARE and ask specifically: “Does my plan’s non-renewal give me a guaranteed issue right for Medigap?” Write down the date and the name of the representative.

Protect Your Doctors Before You Protect Your Premium

Here is the mistake that costs people the most: shopping by premium first. A $0 premium plan is worthless if it does not include your cardiologist.

Before you compare a single plan, do this:

List your providers. Write down every doctor, specialist, hospital, and clinic you actually use. Include the ones you see once a year — dermatologist, ophthalmologist, and your preferred lab.

Verify participation, don’t assume it. A plan’s online directory is frequently out of date. Call your doctor’s office directly and ask two questions: “Are you in this plan’s network for 2027?” and “Are you accepting new patients under this plan?” Provider directories can list a physician as in-network even after they have stopped taking new patients.

Check the network type. An HMO generally requires referrals and keeps care inside the network. A PPO costs more but gives you some out-of-network flexibility, which matters enormously if your specialist is only in one network. If your care is concentrated at a specific hospital system, ask whether that system is in-network for the plan you are considering.

If your doctors are not in the new plan you are considering, that is often reason enough to look elsewhere — or to consider Original Medicare with a Medigap supplement, which generally lets you see any provider who accepts Medicare nationwide.

Then Check Your Prescriptions, Line by Line

Formularies change every year, and a drug that was Tier 2 under your old plan can be Tier 4 under your new one. That single tier shift can add thousands of dollars to your annual costs.

Look up every medication you take, brand and generic, in each plan’s 2027 formulary. Pay attention to four numbers for each drug: the tier, any prior authorization requirement, any step therapy requirement, and any quantity limit. Then check whether your pharmacy is in the plan’s preferred network; using a non-preferred pharmacy can raise your copay substantially.

Also confirm your plan’s out-of-pocket maximum and whether it covers Part B drugs, like injectables given in a clinic, which are billed differently than Part D prescriptions and can surprise people who assume all drugs fall under the pharmacy benefit.

Your Action Timeline for the Fall

Medicare Open Enrollment runs October 15 through December 7 for coverage starting January 1. Because termination notices are due by October 2, you will have your letter in hand right as the window opens. Work in this order:

Step 1 — Read the notice carefully and note your last day of coverage and any guaranteed issue rights.

Step 2 — Verify your providers by phone, not just online.

Step 3 — Check your drug list against each candidate plan’s formulary.

Step 4 — Compare total annual cost, not just premium. Add up premiums, deductibles, and copays for a typical year of care, plus the maximum you could pay in a bad year.

Step 5 — Decide whether to stay in Medicare Advantage or move to Original Medicare with a Medigap plan. If you have a guaranteed issue right, this may be your one clean opportunity to make that switch without answering health questions.

Do not wait until December. Plan enrollments, customer service lines, and broker calendars all get jammed in the final two weeks, and a rushed decision made on December 5 can cost you for all of 2027.

The Bottom Line

A plan exit feels like a disruption, but it is also a chance to re-examine coverage you may have kept on autopilot for years. Many people who are forced to shop end up with better drug coverage, a more stable network, or lower total costs, simply because they looked carefully for the first time in a decade.

The key is to act early, lead with your doctors and drugs rather than the premium, and treat any guaranteed issue right as a deadline you cannot afford to miss. If you would like to see which Medicare Advantage and Medigap plans are available in your ZIP code and compare them side by side, visit Medigap Plan Finders for free, no-obligation quotes. It takes a few minutes, and it is the difference between hoping your coverage works and knowing it does.