A letter arriving in mailboxes this September will carry unwelcome news for hundreds of thousands of older Americans. Humana, one of the country’s largest Medicare Advantage insurers, is discontinuing plans that cover roughly 600,000 members at the end of 2026, and for most of them the first official warning will be a routine-looking notice in the fall mail. The move marks the second straight year the company has pulled back from parts of its Medicare business.
What Humana confirmed and how many are affected
The insurer disclosed the exits alongside its second-quarter results, framing them as part of a deliberate retreat from plans and counties it can no longer serve profitably. As Healthcare Dive reported, the affected plans cover about 600,000 people, or roughly 8 percent of Humana’s more than 7 million Medicare Advantage members, with coverage ending December 31, 2026. Company executives indicated they expect to retain a portion of those members by steering them into other Humana plans that remain available, much as they did after a similar round of exits a year earlier.
For the members themselves, the corporate rationale matters less than the practical reality: the specific plan they rely on will not exist in 2027, and staying enrolled is not an option. Doing nothing carries real risk, because a member who fails to choose a replacement could end up back in Original Medicare without drug coverage, exposed to prescription costs and a potential late-enrollment penalty.
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Why the September letter is the one to open
The notice at the center of this story is the Annual Notice of Change, a document every Medicare Advantage and Part D plan must send its members before the enrollment season. Federal rules require plans to deliver it by September 30, which is why affected Humana enrollees will hear about the discontinuation in September rather than closer to year-end. The document spells out exactly what is changing, and when a plan is being terminated it tells the member their coverage is ending rather than merely adjusting.
The problem is that these notices are easy to mistake for junk mail. They arrive in plain envelopes during a stretch when Medicare-related mailings pile up, and a member who sets one aside can miss the single clearest signal that action is required. Reading the September letter carefully, and specifically checking whether it announces a plan termination, is the difference between a smooth switch and an accidental coverage gap.
The enrollment windows that follow
Once a plan is being dropped, the calendar takes over. The Medicare Annual Enrollment Period runs from October 15 to December 7, the main window to select a new Medicare Advantage plan or a stand-alone Part D drug plan for coverage starting January 1, 2027. Because Humana is terminating these plans rather than tweaking them, affected members also qualify for a Special Enrollment Period tied to the non-renewal, which extends the deadline to move beyond the standard December cutoff. Medicare’s guide to joining a plan describes how those periods work and how to compare options on the official Plan Finder.
There is also a protection that is easy to miss. When a Medicare Advantage plan stops operating, the member earns a guaranteed-issue right to purchase a Medigap supplement policy without answering health questions, as outlined on Medicare’s page covering guaranteed issue rights. That window is limited, generally 63 days around the loss of coverage, so a retiree who wants to return to Original Medicare with a supplement should act within it.
Steps for affected members this fall
The concrete moves are straightforward once the notice arrives. A member can enroll in a different Medicare Advantage plan still offered locally, or return to Original Medicare and add a Part D drug plan, optionally pairing it with a Medigap policy through the guaranteed-issue window. Confirming that a new plan includes current doctors and prescriptions, and comparing the total of premiums, copays, and out-of-pocket maximums rather than the premium alone, keeps the decision grounded in real costs. The single most important step is the simplest: open the September letter, confirm whether it announces a termination, and start comparing plans before the December 7 deadline closes the main window.
This article was researched and drafted with the assistance of AI and reviewed by The Financial Wire editorial team.
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David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
