Something significant is happening inside the Medicare Advantage market, and if you are one of the roughly 33 million Americans enrolled in a Medicare Advantage plan, it affects you directly. Insurers are withdrawing from Medicare Advantage at a rate not seen since the program's early years, leaving hundreds of thousands of beneficiaries scrambling to find new coverage before January 1st. The exits are not random — they reflect a financial squeeze on insurers that has been building for several years and is now reaching a breaking point in markets across the country.
The core problem is a mismatch between what insurers expected to spend on their Medicare Advantage members and what they are actually spending. After the COVID-19 pandemic, many seniors deferred medical care for months or even years. When they finally sought treatment, they were sicker, needed more procedures, and required longer hospital stays than actuaries had projected. At the same time, the Centers for Medicare and Medicaid Services has been recalibrating the risk-adjustment payments it makes to insurers — payments designed to compensate plans for enrolling sicker members. Those recalibrations have reduced payments to many plans, compressing margins further. Plans that once looked profitable on paper are now losing money, and insurers are choosing to exit markets rather than continue absorbing losses quarter after quarter.
To understand the scale of what is happening, consider that Medicare Advantage plan availability had been expanding for most of the past decade. In 2024, the average Medicare beneficiary could choose from roughly 43 Medicare Advantage plans in their county, according to KFF analysis. That number is now contracting in many regions, particularly in rural and suburban markets where enrollment density was always thinner and profit margins were tighter. Some counties that had a dozen or more plan options just a few years ago are now down to four or five. In a handful of rural counties, beneficiaries may find themselves with only one or two choices — or none at all — effectively forcing a return to Original Medicare whether they planned for it or not. The Medicare Advantage program has grown from covering roughly 13 percent of Medicare beneficiaries in 2004 to more than 54 percent today, according to KFF, so the stakes of this contraction are enormous.
For beneficiaries whose plans are exiting, the immediate practical question is: what happens to my coverage? When a Medicare Advantage plan exits a service area, CMS requires the insurer to notify affected members by October 1st for changes taking effect January 1st. You will receive a letter — do not ignore it or set it aside assuming it is junk mail. That letter triggers a Special Enrollment Period that allows you to switch to another Medicare Advantage plan or return to Original Medicare outside of the standard Annual Enrollment Period window, which runs October 15 through December 7. If you miss acting on your SEP, you are not left without coverage — CMS will auto-enroll you into Original Medicare — but you will lose the ability to choose your own plan on your own timeline.
Critically, if you choose to return to Original Medicare after your plan exits, you also gain guaranteed-issue rights for a Medicare Supplement policy, commonly called Medigap, for approximately 63 days from the date your plan coverage ends. This is one of the few moments outside of your very first Medicare enrollment period when insurers in most states cannot deny you a Medigap policy or charge you higher premiums based on pre-existing conditions. Under normal circumstances, if you have been in a Medicare Advantage plan for several years and want to switch to Original Medicare plus Medigap, insurers in most states can reject your application or price you out based on your health history. An involuntary plan exit removes that barrier — temporarily — and gives you a clean shot at comprehensive supplement coverage regardless of what conditions are in your medical record.
That guaranteed-issue window is enormously valuable and surprisingly easy to miss. Medigap Plan G, currently one of the most popular options for new enrollees, typically covers the Part A hospital deductible — set at $1,676 in 2025 — the Part B coinsurance, skilled nursing facility coinsurance, and most other cost-sharing gaps in Original Medicare. Monthly premiums vary by age, location, tobacco use, and insurer. A 70-year-old in a mid-size city might pay anywhere from $120 to $220 per month depending on the state and the specific insurer. That is a real monthly cost, but for someone with diabetes, heart disease, or a history of cancer, the predictability of costs under Original Medicare plus Medigap can be far less financially risky than a Medicare Advantage plan with a $9,350 out-of-pocket maximum. If you live in California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, or Oregon, you also have a birthday rule that gives you a 30-day window each year around your birthday to switch Medigap plans without medical underwriting — an additional protection worth knowing about regardless of whether your plan is exiting.
Not everyone whose plan exits will want to go the Medigap route, and that is a legitimate choice. If other Medicare Advantage plans remain available in your county, you may find one that preserves the benefits you value most — dental, vision, hearing, and fitness programs that Original Medicare does not cover. But this is where beneficiaries need to be especially careful. The plans that remain after a wave of exits are not necessarily the strongest plans — sometimes they are simply the ones that have not yet decided to leave. Before enrolling in any remaining Medicare Advantage plan, check three things carefully. First, the plan's CMS star rating: plans are rated on a 1-to-5 scale, and plans rated below 3 stars for three consecutive years can be terminated by CMS, which would put you right back in this situation. Second, the provider network: confirm that your primary care physician, specialists, and preferred hospital are still listed as in-network for the coming plan year, because networks change annually. Third, the drug formulary: verify that your specific medications are covered and at what tier, because a drug moving from Tier 2 to Tier 3 can add hundreds of dollars to your annual costs.
Out-of-pocket maximums deserve particular attention right now. In 2025, Medicare Advantage plans are required to cap out-of-pocket costs for in-network services at $9,350, and combined in-network and out-of-network costs at $14,000. However, individual plans set their own maximums below those caps, and the variation is dramatic. A plan with a $9,350 maximum is a very different financial risk than one with a $4,500 maximum if you end up needing surgery, a hospital stay, or ongoing chemotherapy. When comparing plans on Medicare's Plan Finder tool at medicare.gov, use the personalized cost estimator — enter your actual health conditions and your specific drug list — and sort by estimated annual cost rather than monthly premium. Many Medicare Advantage plans carry a $0 monthly premium, which is appealing but tells you almost nothing about your true cost exposure over the course of a year.
The plan exit wave is also raising harder questions about the long-term structure of Medicare Advantage itself. CMS has been gradually tightening the benchmark payments that determine how much insurers receive per enrollee, and the market is now adjusting — sometimes painfully for beneficiaries. Some health policy analysts believe the exits represent a necessary correction that will ultimately leave a more financially sustainable set of plans. Others worry that the beneficiaries most harmed will be those in rural areas and lower-income communities who relied on Medicare Advantage's extra benefits and zero-dollar premiums precisely because they could not afford Medigap premiums. The financial pressure is also showing up in benefit reductions among plans that are staying in the market. In 2025, many plans trimmed supplemental benefits compared to what they offered in 2023 and 2024 — reducing dental allowances, cutting back over-the-counter product credits, and narrowing vision coverage. This trend is expected to continue into 2026 as insurers try to manage costs without exiting entirely.
If you are currently in a stable Medicare Advantage plan that is not exiting, this is still a moment to pay close attention. The Annual Notice of Change letter — which your plan is required to send you each September — tells you exactly what is changing in your plan for the coming year. Read the sections on premiums, cost-sharing, and covered benefits carefully. If your plan is raising its out-of-pocket maximum, dropping a drug from its formulary, or removing a specialist from its network, you have the right to switch during the Annual Enrollment Period, which runs October 15 through December 7 each year. Changes take effect January 1st. If you miss the AEP, the Open Enrollment Period from January 1 through March 31 allows you to switch from one Medicare Advantage plan to another, or to return to Original Medicare, one time — though you cannot use the OEP to add a Medigap policy unless you have a separate qualifying event.
For beneficiaries who want help comparing their options without pressure from a salesperson, the State Health Insurance Assistance Program offers free, unbiased counseling in every state. SHIP counselors are not insurance agents and receive no commissions — they can sit with you, review your medications and your list of doctors, and help you compare plans side by side using real numbers. To find your local SHIP office, call 1-800-MEDICARE (1-800-633-4227) or visit shiphelp.org. This service is particularly valuable for people navigating an involuntary plan exit for the first time, or for those who have not actively compared plans in several years and may be enrolled in coverage that no longer fits their health needs or their budget.
The Medicare Advantage market is going through a genuine structural shift, not a temporary blip. The plans available to you in 2026 may look meaningfully different from what was available in 2023 or 2024 — fewer choices in some areas, reduced benefits in others, and higher cost-sharing in plans that remain. Beneficiaries who review their coverage annually, understand their guaranteed-issue rights when plans exit, and use free counseling resources like SHIP are far better positioned to maintain quality, affordable coverage than those who let their enrollment auto-renew without a second look. The enrollment windows are fixed and the deadlines are firm — acting early gives you the most options.