Roughly one in ten Medicare Advantage members may need to shop for a new plan for 2027, as insurers finalize another round of exits and benefit cuts aimed at rebuilding profit margins that thinned out over the past two years. UnitedHealthcare and Humana have each disclosed reductions affecting well over a million members combined, and a broker-facing analyst note circulated this month describes another year of leaner benefits industrywide. The estimate carries real uncertainty this early in the filing cycle, but it echoes 2026, when a similar share of enrollees were pushed out of a plan that left their market altogether.
The Pattern Behind the ‘One in Ten’ Estimate
The 10 percent figure traces back to how often this has already happened. One study cited alongside a recent industry review found that about 10 percent of Medicare Advantage enrollees had their plan exit their market in 2026, a rate insurers’ early 2027 moves suggest could repeat or worsen once every filing is finalized this fall.
Those early moves are concentrated at the top of the industry. A Leerink analyst note based on broker commentary and reported by Axios on September 10, 2026, found that UnitedHealthcare and Humana are expected to cut the most for 2027, with UnitedHealthcare appearing to have dropped about 13 percent of the plans it offers across 18 states. Both insurers declined to comment on the note when it was published.
UnitedHealthcare and Humana’s own disclosures put real numbers behind that pattern. UnitedHealth Group expects to end 2026 with roughly 1.1 million fewer Medicare Advantage members than a year earlier, and Humana has said its 2027 exits will affect roughly 600,000 seniors, about 8 percent of its 7.2 million Medicare Advantage members. Together, the two companies alone account for a membership shift well past a million people.
A separate survey of leaders from 35 health plans, conducted by HealthScape Advisors and cited alongside the Leerink note, found that nearly 70 percent expected their own 2027 benefits to be less generous than this year’s, whether through smaller allowances, narrower drug formularies, or reduced supplemental coverage rather than an outright plan exit.
Free plan-change checklist: A Medicare plan can change its costs, drugs and doctors for next year even when its name stays the same. Check the changes with the free 2027 review sheet.
Why Insurers Are Pulling Back Even as Federal Payments Rise
Medicare Advantage now covers more than half of all Medicare-eligible beneficiaries nationwide, according to ongoing tracking from Becker’s Hospital Review, which means cuts of this scale reach a wide share of the country’s retirees rather than a narrow corner of the program. That scale is part of why insurers say even a federal funding increase has not been enough to stop the retrenchment.
Regulators had originally floated holding 2027 Medicare Advantage payment rates flat before finalizing a rule that added roughly $13 billion more than that proposal, yet insurers argue the increase still trails what rising medical costs and utilization actually require. Humana’s chief executive, Jim Rechtin, has told investors the company’s 2027 bids are built to support a sustainable pre-tax margin of at least 3 percent by 2028, a target that requires trimming lower-return plans now rather than waiting.
Industry advocates and cost-control critics read the same numbers differently. The Better Medicare Alliance has said seniors continue to feel the effects of recent funding pressure, while other health policy analysts have long argued that Medicare Advantage plans have been overpaid relative to traditional Medicare, a dispute that shapes how aggressively Washington adjusts rates each year and, in turn, how insurers plan their next filing.
What Beneficiaries Should Do Before the Fall Enrollment Window
Every Medicare Advantage plan that continues into 2027 must mail its Annual Notice of Change by September 30, and most non-renewal notices for plans that are ending go out on a similar timeline ahead of the Annual Enrollment Period, which runs October 15 through December 7. Reading both documents in full, rather than skimming the cover letter, is the only way to know whether a specific plan is shrinking its network or leaving a county outright.
Members whose plan does not renew get a separate Special Enrollment Period into the following February, and a federal guaranteed-issue right lets them buy certain Medigap policies without medical underwriting if they apply within roughly two months of the old coverage ending. That right matters most for beneficiaries managing ongoing treatment, since a network change mid-course can force new referrals and new prior authorizations at the worst possible time.
Research into 2026’s wave of forced plan exits found the disruption fell unevenly, landing more often on enrollees in rural counties and in markets where fewer people carry Medicare Advantage to begin with. Beneficiaries in those areas often have fewer replacement plans to choose from once their old one leaves, which can make the difference between switching plans and switching to Original Medicare instead.
Insurers are still finalizing the plan-level details behind this fall’s letters, and the true size of the 2027 shift will not be confirmed until every company’s filings are public. Until then, the surest sign of trouble for any individual beneficiary will not be an industry estimate, but their own mailbox: the Annual Notice of Change or non-renewal letter every Medicare Advantage plan is required to send under the same federal deadlines this autumn.
Reading the Industry Numbers Against One Household’s Own Notice
An industry-wide estimate like one in ten does not say whether a specific household’s plan is one of the ones changing, and the only way to know is to read that plan’s own Annual Notice of Change against what a comparable plan would cost and cover instead.
The 2027 Medicare Open Enrollment Decision Kit is a 42-page decision kit built around a cost calculator spreadsheet that compares plans on cost, drugs and doctors, paired with a provider call script for confirming a network hasn’t quietly changed.
Work through a current Annual Notice of Change using The 2027 Medicare Open Enrollment Decision Kit.
This article was researched and drafted with the assistance of AI and reviewed by The Money Overview editorial team.
