About 600,000 older Americans are about to open a letter from Humana telling them the Medicare Advantage plan they rely on will not exist in 2027. The insurer confirmed the cuts on its second-quarter earnings call, and executives said the non-renewal notices start landing in September, well before the Annual Enrollment Period opens on October 15. For the households affected, that letter is not a marketing flyer to toss; it is the formal warning that next year’s coverage has to be rebuilt from scratch. At roughly 8% of Humana’s Medicare Advantage book, it ranks among the largest single-insurer disruptions retirees have faced in the privatized program.
Why Humana is walking away from 600,000 members
The exits are a deliberate margin play, not a reaction to one bad quarter. Humana has told investors its top priority is returning to a sustainable pre-tax margin of at least 3% by 2028, and leadership said it would shed the plans with the weakest capital returns to keep benefits stable in the plans that still make money. Chief Financial Officer Celeste Mellet described the move as trimming the lower tail of profitability rather than cutting benefits evenly across the portfolio. The roughly 600,000 affected members represent about 8% of the insurer’s 7.2 million Medicare Advantage enrollees.
The retreat also traces to a slide in Humana’s Medicare star ratings, the quality scores that steer billions of dollars in federal bonus payments. Most of the discontinued plans carry ratings of 3.5 stars or lower for the 2027 bonus year, the tier where the math no longer works under flat government rates and rising medical costs. It is the insurer’s second consecutive year of plan exits after it pulled coverage from three states and 194 counties for 2026, a signal that the downsizing sweeping the Medicare Advantage industry is not finished.
The retreat also has to be read against how large Medicare Advantage has grown. Privatized plans now enroll more than half of all Medicare beneficiaries, so a pullback by a top-two carrier reshapes the market across whole regions rather than nudging it. The star ratings driving the decision are not cosmetic either: plans rated four stars or higher collect a 5% quality bonus on their federal payments, money that funds the extra dental, vision, and reduced-premium features that make Advantage plans attractive in the first place. When a plan slips below that line, the bonus vanishes and the benefits it paid for become hard to sustain, which is the squeeze pushing the weakest plans out of the market entirely.
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What the September non-renewal letter actually means
The notice is a plan non-renewal, which is not the same as a member being dropped mid-year. Current coverage stays intact through December 31, 2026, so no one loses benefits overnight. What changes is that the specific plan simply will not be offered in 2027, forcing the member to accept whatever replacement Humana proposes, shop for a different Medicare Advantage plan, or move back to Original Medicare during open enrollment. The insurer said it expects to recapture about 40% of the affected members, or roughly 240,000 people, into other plans it still sells.
That recapture math is also a warning. It implies the majority of affected members, close to 360,000 people, will end up on a plan from a different insurer or on Original Medicare. Humana reaffirmed its adjusted earnings guidance alongside the cuts in its second-quarter results, underscoring that the exits are being managed for profitability, not enrollment growth. The Annual Enrollment Period runs October 15 to December 7, a narrow window to compare replacement coverage before the old plan disappears. Anyone who does nothing risks being moved to a default option with a different provider network, drug formulary, or premium.
Members who lose a plan to non-renewal are not confined to the October-to-December window, however. A plan termination triggers a Special Enrollment Period that runs from December 8 through the end of February, giving affected enrollees extra time to pick a replacement or return to Original Medicare after the standard enrollment period closes. Missing even that extension is the real danger: a member who never chooses is dropped to Original Medicare with no drug coverage, which exposes them to a Part D late-enrollment penalty that is added to premiums permanently once they do enroll.
The path back to Original Medicare and a Medigap policy
A plan non-renewal quietly opens a door that is usually locked. When a Medicare Advantage plan stops being offered, a member who returns to Original Medicare gains a guaranteed-issue right to buy a Medigap policy, meaning an insurer cannot deny coverage or raise the price based on health history. Federal rules set a tight window: the application can be filed up to 60 days before the plan ends and no more than 63 days after coverage ends, according to Medicare’s guaranteed-issue rules.
That window matters most for members in poorer health, who could otherwise be shut out of Medigap by medical underwriting for the rest of their lives. Whether to use it comes down to a tradeoff: a Medigap-plus-Original-Medicare setup usually costs more in monthly premiums but far less at the point of care, while jumping to another Medicare Advantage plan keeps premiums low but re-exposes the member to networks and prior authorization. For 600,000 households, the September letter is the starting gun on a choice that will shape out-of-pocket costs, doctor access, and drug coverage for all of 2027, and, in the case of the Medigap right, potentially for years beyond it.
This article was produced with AI assistance and reviewed against primary sources by The Money Overview editorial team.
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