A piece of mail landing in September will decide the 2027 coverage of about 600,000 older Americans. Humana, the second-largest Medicare Advantage insurer, has confirmed it will discontinue a slice of its plans next year and notify affected members that their current coverage will not continue. The number represents roughly 8% of the company’s 7.2 million Medicare Advantage enrollees, and the notice itself starts a clock that most recipients have never had to watch before.
What the September non-renewal letter actually is
The document arriving this fall is not junk mail and not a marketing flyer. When an insurer decides a plan will not return the following year, federal rules require it to send a formal plan non-renewal notice, and it travels alongside the Annual Notice of Change that every Medicare Advantage member receives each autumn. Plans are required to deliver those year-ahead notices by the end of September, which is why Humana’s letters are landing when they are.
For the 600,000 members whose plans are being cut, the letter carries a specific message: the plan will end December 31, 2026, and coverage will not roll over automatically into anything comparable. Anyone who does nothing risks being moved to Original Medicare without a drug plan or, in some cases, defaulting into a different arrangement they did not choose. The notice is worth keeping, because it doubles as proof of the plan’s termination later on.
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Why Humana is culling its weakest-rated plans
The retreat is a margin decision, not a coverage philosophy. Humana has framed the 2027 exits as part of a push to restore profitability in a business squeezed by rising medical costs, and the plans on the chopping block skew toward the low end of Medicare’s quality scale. According to the company’s disclosures, the majority of the discontinued plans carry star ratings of 3.5 or lower, the tier where federal quality bonuses shrink and enrollment tends to be thinnest.
Star ratings matter to an insurer’s bottom line because higher-rated plans collect larger bonus payments from the government, money that can be plowed back into extra benefits. Plans stuck below that threshold earn less and cost more to run, so trimming them is one of the fastest levers a carrier can pull. The result is that the members most likely to lose coverage are concentrated in plans the company already considered underperformers.
The enrollment windows that open once a plan ends
A non-renewal is disruptive, but it does not leave anyone stranded without options. The main opportunity is the Annual Enrollment Period, which runs from October 15 through December 7 and lets anyone on Medicare pick a new Medicare Advantage or Part D plan for the following year, with coverage starting January 1. That is the cleanest path for a member whose plan is disappearing to line up a replacement before the old one expires.
There is also a safety net for people who miss that window. A plan non-renewal triggers a Special Enrollment Period that runs from December 8 through the end of February, giving affected members extra time to choose new coverage after the standard deadline has passed. And for anyone who decides to leave Medicare Advantage entirely and return to Original Medicare, the loss of a plan opens a guaranteed-issue right to buy a Medigap supplement, generally for up to 63 days after the old coverage ends, without answering health questions or facing medical underwriting.
Why this looks like a churn strategy, not an exit
The word “exit” overstates what is happening. Humana is not leaving Medicare Advantage; it is reshaping which plans it offers and where. The company has a recent track record of winning many of these members back: it recaptured roughly 40% of the enrollees affected by its 2025 plan reductions, often by steering them toward a different Humana plan in the same market. That pattern suggests a sizable share of the 600,000 will be offered a Humana alternative rather than pushed out of the company altogether.
For the members caught in the middle, the practical takeaway is that a replacement plan from the same insurer is not automatic and may not match the old one on premiums, provider networks, or drug coverage. Comparing the full field of plans during open enrollment, rather than accepting the first alternative offered, is how a displaced member avoids trading down.
What stays uncertain until the fall plan data lands
The 600,000 figure and the September timing come from Humana’s own guidance, but the granular details, exactly which plans end, in which counties, and what replacements appear, are still preliminary. Complete 2027 plan information does not become public until the Medicare Plan Finder refreshes with next year’s data in the fall, ahead of the October 15 start of open enrollment. Until then, the letter in the mailbox is the most reliable signal a member has, and the calendar it sets in motion is the part worth acting on early.
This article was produced with the assistance of artificial intelligence and reviewed by The Financial Wire editorial team.
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