If a letter arrived this fall saying your Medicare Advantage plan isn’t being renewed for 2027, here’s the short version: this isn’t a crisis. It’s a real, dated pattern — several insurers are pulling specific plans for next year, and every affected member gets the same rights. You have more time to decide than the letter makes it feel like, plus a federally protected option most people never hear about. The one thing that actually costs you money is doing nothing at all.

This applies whether the letter is on your own kitchen table or a parent’s — plenty of adult children end up managing this in December because Mom or Dad set it aside in September.

Gleemo isn’t a doctor, an insurance agent, or Medicare. This explains how Medicare Advantage non-renewals typically work, as of this writing (early August 2026) — every plan, state, and situation is different, and the 2027 picture is still emerging. Confirm your situation with your plan, 1-800-MEDICARE (1-800-633-4227), or your free State Health Insurance Assistance Program (SHIP) counselor at shiphelp.org before deciding.

Some Medicare Advantage Plans Won’t Be Renewed for 2027

Here’s the honest version, not the alarming one: several large insurers are pulling specific Medicare Advantage plans out of specific markets for 2027. It touches a lot of people: about 55% of Medicare beneficiaries — 35.2 million of 64.2 million — are on Medicare Advantage.

Two insurers have put real numbers on it so far. Humana has confirmed, on its own Q2 2026 earnings call, that 2027 exits will affect roughly 600,000 of its 7.2 million Medicare Advantage members — about 8.3% of its book. Humana also expects to recapture roughly 40% of those members into a different Humana plan, the same share it recaptured after its 2025 exits.

Molina Healthcare is exiting its entire individual Medicare Advantage drug-plan line for 2027, keeping only its Dual-Eligible Special Needs Plans. The business reason insurers give: CMS’s 2027 rate, finalized April 6, 2026 (a locked-in 2.48% increase, over $13 billion more than 2026), falls short of what many say rising costs require.

The full picture isn’t finished. Only Humana and Molina have disclosed 2027 numbers so far; CVS Health, Aetna’s parent, reports earnings August 5, 2026, and CMS’s official Landscape Files post in October, right before enrollment opens. Expect more headlines before then, not fewer.

How to Tell If Your Letter Means Your Plan Is Actually Ending

Not every letter this fall means your coverage is going away.

ANOC vs. Non-Renewal Notice: They Look Similar, But Aren’t

Every Medicare Advantage and Part D member gets an Annual Notice of Change (ANOC) each year, mailed by September 30. Most years, for most people, it just describes updates to the same plan: next year’s premium, copays, drug list, network. Nothing is ending.

A non-renewal or service-area-reduction notice is different: it says your specific plan won’t be offered where you live next year. Insurers must send it at least 90 days before the plan ends, or by October 1, whichever is earlier. Whether your plan disappears everywhere or the insurer just pulls it from your county, CMS treats both the same for your rights — everything below applies either way.

Read your letter’s actual wording rather than assuming. Helping a parent from a distance? Ask them to set aside anything that looks like plan mail in September.

The One Mistake That Costs the Most: Doing Nothing

Here’s the one thing in this whole process that genuinely costs people money: opening the letter, not liking it, and doing nothing.

What “Default to Original Medicare” Actually Means for Your Wallet

If your plan is non-renewed and you take no action, you’re automatically enrolled in Original Medicare, Part A and Part B — not the soft landing it sounds like, for two reasons.

First, Part D drug coverage is NOT automatic; you must actively choose a plan. Go 63 or more consecutive days without creditable drug coverage, and you trigger the Part D late-enrollment penalty: 1% of that year’s national base beneficiary premium ($38.99 in 2026) per full month of the gap, added permanently. A 12-month gap adds about $4.68 a month, forever, on 2026’s premium.

Second, and bigger: Original Medicare alone has no annual cap on what you could owe. Medicare Advantage plans must cap in-network out-of-pocket costs by law — $9,250 in 2026. Original Medicare has no such ceiling; the standard 20% Part B coinsurance just keeps applying, indefinitely.

“Do nothing” isn’t neutral — it’s walking away from both a drug plan and a cost cap, by default instead of on purpose.

Your Real Timeline: More Than Four Months, Not Six Weeks

Here’s the genuinely reassuring part: you have more time to decide than the letter makes it feel like.

AEP Runs Oct. 15–Dec. 7; Your Extra Window Runs Through Feb. 28

• By September 30, 2026: ANOC and non-renewal letters are mailed.
• October 15–December 7, 2026: the Annual Enrollment Period (AEP), open to every Medicare beneficiary.
• December 8, 2026–February 28, 2027: an ADDITIONAL Special Enrollment Period for anyone whose plan is non-renewed, on top of AEP.
• Together: a continuous 137-day runway from October 15 through February 28 — about four and a half months, not six weeks.

Don’t wait for the last day, though — act well before February 28, especially with drug coverage on the line. There’s a separate Medigap deadline below, on its own clock.

Staying on Medicare Advantage vs. Switching to Original Medicare, Compared

You have two real paths once your plan is affected, and Gleemo won’t say which is right for you — that’s for you, your doctors, and a free SHIP counselor to work out. Here’s how they compare, with “do nothing” alongside as a reminder of the stakes.

The Protection Most People Don’t Know They Have: Guaranteed-Issue Medigap

Here’s the fact that changes how risky leaving Medicare Advantage actually is — and most people in this situation have never heard of it.

Your Window Runs From 60 Days Before to 63 Days After Coverage Ends

Normally, an insurer CAN medically underwrite a Medigap application outside your first Medicare enrollment window — health questions, higher prices, even a flat turndown. That’s why people feel stuck on Medicare Advantage even when it stops working for them.

A non-renewal changes that. Federal law gives anyone whose Medicare Advantage plan is non-renewed, leaves their service area, or undergoes a CMS-approved significant network change a guaranteed-issue right to buy Medigap: no medical underwriting, period. The insurer cannot deny your application, delay it, charge more, or impose a waiting period. Two independent state regulators, Texas and Indiana, confirm this protection — possibly the single most valuable line in this letter.

The window: as early as 60 calendar days before your Medicare Advantage coverage ends, no later than 63 calendar days after. That 63-day clock runs from whichever date is LATER, per Texas’s Department of Insurance — your coverage-end date or your notice date. In the standard case, coverage ending December 31, 2026, that’s a window from November 1, 2026 through March 4, 2027 (Gleemo’s date math; confirm your exact dates with SHIP if your notice arrived late).

It covers Medigap Plans A, B, C, D, F, G, K, or L — except Plans C and F, unavailable to anyone first eligible for Medicare on or after January 1, 2020, for whom D or G are the guaranteed-issue substitute. (Massachusetts, Minnesota, and Wisconsin use non-standardized Medigap designs; confirm this list with your state’s SHIP.)

This right belongs to people who lose coverage involuntarily. If you simply choose on your own to leave Medicare Advantage for an unrelated reason, this guaranteed-issue protection doesn’t apply.

What This Isn’t: Two Common Mix-Ups

A couple of honest scope notes, so nothing above gets misapplied.

Your doctor or hospital left the network, but the plan itself is still being renewed? That’s a network change, not a non-renewal — different rules, and the guaranteed-issue right above doesn’t apply.

Enrolled through both Medicare and Medicaid, or in a Dual-Eligible Special Needs Plan? You likely have different or additional enrollment rights not covered here — ask your SHIP counselor directly.

Where to Get Free Help That Isn’t Selling You Anything

None of these are trying to sell you a policy.

Your plan’s member services number (on your card and in the letter) can explain what’s changing for your plan.

1-800-MEDICARE (1-800-633-4227) is staffed 24/7 except some federal holidays; TTY 1-877-486-2048.

Your State Health Insurance Assistance Program (SHIP) offers free, one-on-one counseling with no policy to sell — find a counselor at shiphelp.org or call 1-877-839-2675. SHIP is funded right now at roughly $55 million, the same level as the past three years; future funding isn’t guaranteed, so use this free help while it’s available.

The official Medicare Plan Finder at Medicare.gov lets you enter your ZIP code and see what’s actually available where you live, and what it would really cost.

Frequently Asked Questions

What’s the actual deadline to choose new coverage?

AEP runs October 15–December 7, 2026, for everyone. A non-renewed plan adds a Special Enrollment Period through February 28, 2027 — about four and a half months total. Don’t wait for the last day.

What happens if I do absolutely nothing?

You’re automatically enrolled in Original Medicare, Part A and Part B. Part D drug coverage is NOT automatic, and Original Medicare alone has no annual cap on what you could owe.

Can an insurance company refuse to sell me a Medigap policy because of my health history?

Not in this situation. Losing Medicare Advantage involuntarily — a non-renewal, service-area exit, or CMS-approved network change — gives you a federal guaranteed-issue right: no denial, no delay, no higher price, no waiting period, from 60 days before to 63 days after coverage ends.

Is this only happening to Humana members?

No. Molina is exiting its entire individual Medicare Advantage drug-plan line for 2027, and UnitedHealthcare has told investors it’s making “selective changes in market participation” for 2027 without naming a number. Humana is the only insurer with a confirmed 2027 count: about 600,000 members.

Where can I get free help that isn’t trying to sell me something?

Your State Health Insurance Assistance Program (SHIP) at shiphelp.org or 1-877-839-2675, and 1-800-MEDICARE (1-800-633-4227), 24/7. Both are free and not affiliated with insurance sales.

The Bottom Line

This isn’t a crisis, it’s a checklist. Your letter about a Medicare Advantage plan not being renewed for 2027 is real — but you have more time than six weeks, a federally protected right most people never hear about, and free, unbiased help that isn’t selling anything.

The one truly costly mistake is the quiet one: opening the letter and doing nothing. Read what you received, mark your dates, and if you’re unsure which path fits you, your plan, 1-800-MEDICARE, and your local SHIP counselor are there to help, free.

Gleemo has more honest, clearly written guides like this one on the numbers and fine print of this stage of life, and the full guide is at gleemo.org.