A quiet but accelerating shift is reshaping where Medicare Advantage members can get care. A growing number of hospitals and physician groups are ending their contracts with private Advantage plans, and when a system walks away, the patients enrolled in those plans can lose in-network access to the doctors and facilities they have relied on for years. For older Americans, the result is often a choice between changing plans during the next enrollment window or facing far higher out-of-network bills.
How many systems have walked away in 2026
At least 25 health systems have narrowed or dropped Medicare Advantage contracts so far in 2026, according to a running tally from Becker’s Hospital Review. That follows roughly 32 systems in 2024 and about 40 in 2025, making this a sustained retreat rather than a one-year blip. Prominent names on the 2026 list include the Mayo Clinic, which is out of network with most Advantage plans offered by UnitedHealthcare and Humana, and New York’s Mount Sinai Health System, which dropped Anthem’s Advantage plans. The systems span academic medical centers and regional hospital networks across multiple states, a breadth that signals the pullback is not confined to any single market.
Hospitals cite two recurring complaints: prior-authorization requirements that delay or deny care, and reimbursement that arrives slowly or falls short of what traditional Medicare pays. Those disputes are between the providers and the insurers, but the people caught in the middle are the enrollees, who discover during a billing cycle or a scheduling call that a longtime hospital no longer counts their plan as in-network.
Free retirement updates: Miss a Medicare enrollment window and the chance to change plans can disappear until the next one. Get free updates that help retirees stay ahead of the deadlines that matter.
What a contract exit means for the money
Traditional Medicare is accepted by nearly every hospital in the country, but a Medicare Advantage plan pays full benefits only inside its own network. When a hospital drops a plan, an enrollee who keeps using that hospital can be treated as out of network, which typically means higher cost-sharing and, in some cases, bills the plan will not cover at all. For someone in the middle of treatment or managing a chronic condition, that gap can amount to thousands of dollars.
The disruption is uneven. Some systems drop only certain Advantage insurers while keeping others, so two neighbors on different plans can have very different access to the same hospital. That is why a general headline about a system leaving Advantage is only the starting point; the detail that matters is whether a specific plan is affected and whether a preferred doctor or facility remains in that plan’s network for the coming year.
The enrollment windows that let members respond
The most reliable time to react is the Medicare annual enrollment period, which runs October 15 through December 7, when any member can switch Advantage plans or move to traditional Medicare with a drug plan for coverage starting January 1. There is also a Medicare Advantage open enrollment period from January 1 through March 31 that gives current Advantage members one more chance to change plans or return to Original Medicare, as outlined in Medicare’s guidance on joining and switching plans.
A hospital leaving a plan’s network mid-year does not, by itself, automatically grant a special enrollment period, which is a common misunderstanding. Certain significant changes can qualify a member for an out-of-cycle switch in limited circumstances, but that is not guaranteed and should be confirmed with Medicare directly rather than assumed. For most affected enrollees, the practical answer is to plan the change around the fall enrollment window.
The catch in switching back to Original Medicare
Returning to traditional Medicare solves the network problem, since it is accepted at nearly every hospital in the country, but it raises a different cost question. Original Medicare has no annual limit on out-of-pocket spending, so most retirees who rely on it pair it with a Medigap supplement policy to cap their exposure. The obstacle is timing: outside the one-time Medigap open enrollment window that follows signing up for Part B, insurers in most states can review an applicant’s health history and charge more or decline coverage outright, according to Medicare’s guidance on Medigap policies.
That means an Advantage member pushed off a plan by a hospital exit cannot always assume a clean landing in Original Medicare with full supplemental coverage. A person in good health may still qualify without trouble, but someone managing chronic conditions could face higher Medigap premiums or a rejection. The prospect of medical underwriting is one more reason the decision to leave Advantage is better weighed months ahead of the fall enrollment window than in a scramble after a hospital drops a plan.
Checking a plan before the fall window closes
Before renewing a plan, an enrollee can confirm which hospitals and physicians remain in network for the coming year by comparing options through the government’s own tool at Medicare Plan Finder, which lists each plan’s costs alongside its drug coverage. Calling the preferred hospital’s billing office to ask which Advantage plans it will accept in the new year adds a second confirmation that a plan document may not make obvious.
The broader lesson from a third straight year of contract exits is that a Medicare Advantage network is not permanent. A plan that covered a trusted hospital last year may not next year, and the switch happens without a household changing anything on its end. Reviewing the network every fall, rather than auto-renewing, is the step that keeps a hospital exit from turning into an unexpected out-of-network bill.
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.
