Millions of older Americans open a plain envelope from their insurer each fall and set it aside without a second look. For a growing number of Medicare Advantage members, the notice inside now carries a hard message: the private plan they have relied on may not be sold where they live next year. Insurers are retreating from markets they no longer find profitable, and the mailing that arrives in September is often the first warning enrollees get that their coverage is about to change.
Why Humana and other carriers are trimming their 2027 lineups
Humana is exiting Medicare Advantage plans that cover roughly 600,000 members for 2027, the second consecutive year the insurer has pared back its footprint. The pullback is not confined to one company. Plan exits are escalating across the industry as carriers reassess which counties and products still make financial sense, and the number of beneficiaries who may lose their current plan runs from the tens of thousands into potentially hundreds of thousands nationwide.
The pressure traces back to the arithmetic of reimbursement. Medicare Advantage plans are paid by the federal government, and for 2027 the average payment rate is set to rise about 2.48 percent. Insurers argue that increase does not keep pace with rising medical costs and higher utilization among aging members, which erodes the margins that made some plans viable. Humana’s move to drop plans covering about 600,000 members reflects that calculation rather than any single local event.
For the affected members, a discontinued plan is more than a paperwork nuisance. Losing a plan can mean a new provider network, a different drug list, and a fresh set of copays, even for those who find a replacement. The people most exposed are often those with established relationships with specific doctors or hospitals, since a new plan may not include the same providers in network.
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The Annual Notice of Change is the letter that decides it
Every Medicare Advantage and Part D enrollee receives an Annual Notice of Change, or ANOC, from their plan each fall, typically arriving in late September. The document spells out how the plan will differ in the coming year: premium and copay adjustments, changes to the drug formulary or provider network, and, most consequentially, whether the plan will continue to be offered at all. When a carrier withdraws a plan from a service area, the ANOC is where that discontinuation is disclosed.
Because the letter looks routine, it is easy to toss aside, yet it is the single most important piece of mail a Medicare Advantage member receives all year. A member whose plan is being dropped may lose their current coverage at the end of December, not through any fault of their own, but because the insurer chose to stop selling it. Reading the notice closely is what separates an orderly switch from an unwelcome surprise in January.
Open Enrollment from October 15 to December 7 is the window to act
Medicare’s annual Open Enrollment period runs from October 15 through December 7, and it is the stretch when beneficiaries can compare plans and change coverage for the following year. A member whose Medicare Advantage plan is disappearing can use the window to select a different Advantage plan, if one is available locally, or return to Original Medicare and, in many cases, add a stand-alone drug plan. The cost structures of Original Medicare and Medicare Advantage differ in ways worth weighing before the deadline.
Timing matters because the choices made during those eight weeks take effect January 1. A beneficiary who ignores the deadline and whose plan is being terminated could enter the new year without Advantage coverage, and in some situations buying a Medigap policy later can be harder and more expensive than it would have been during an earlier guaranteed-issue window. The fall letter and the enrollment calendar work in tandem: one identifies the problem, the other supplies the remedy.
Even enrollees who keep their plan should read the same notice carefully, because a plan that survives can still change its network, formulary, or out-of-pocket costs enough to alter the value it delivers. The safest assumption each autumn is that nothing about a Medicare Advantage plan is guaranteed to stay the same from one year to the next, and that the specifics are sitting in the envelope.
The broader pattern is one of consolidation. As carriers concentrate on the markets and products they consider sustainable, the menu of plan choices in some areas is narrowing even as overall Medicare Advantage enrollment remains high. Whether the 2027 pullbacks prove to be a one-year correction or the start of a longer retrenchment will not be clear until the full slate of plans is published, but for the members receiving discontinuation notices this fall, the question is narrower and more pressing: what to choose before December 7.
This article was produced with AI assistance and reviewed against primary sources by The Money Overview editorial team.
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