1 in 10 Medicare Advantage Enrollees Face Forced Plan Exit in 2026

If you're one of the roughly 33 million Americans enrolled in a Medicare Advantage plan, 2026 may bring an unwelcome surprise: your plan could simply stop existing. Research from the Johns Hopkins Bloomberg School of Public Health found that approximately 1 in 10 Medicare Advantage enrollees are facing forced disenrollment in 2026, driven by a wave of insurer market exits, plan consolidations, and service area reductions. This isn't a minor administrative shuffle — it means your current coverage, your provider network, your drug formulary, and your out-of-pocket cost structure could all change, whether you chose that change or not.

The scale of what's happening in 2026 is historically significant. Major insurers including Humana, Aetna, and UnitedHealthcare have all announced reductions to their Medicare Advantage footprints for the 2026 plan year, citing rising medical costs, lower-than-expected reimbursement rates from the Centers for Medicare & Medicaid Services (CMS), and unsustainable utilization patterns. Humana alone exited a substantial number of counties, affecting hundreds of thousands of enrollees. When an insurer pulls out of a county or terminates a specific plan, every enrollee in that plan loses coverage at the end of the contract year — December 31, 2025 in most cases — regardless of how satisfied they were with that plan.

If your plan is being discontinued, you should have already received — or will soon receive — a notice from your insurer. CMS requires plans to notify affected enrollees by October 2 of the year prior to the termination. That letter is not junk mail. It will tell you the specific date your coverage ends, whether your insurer is offering you an alternative plan in your area, and critically, that you have a Special Enrollment Period (SEP) to find new coverage. This SEP typically runs from October 1 through the end of February of the new plan year, giving you a meaningful window to shop. If you receive such a letter and do nothing, CMS will attempt to auto-enroll you into another plan — but that plan may have a higher premium, a narrower network, or a drug formulary that doesn't include your current medications.

Understanding what you're actually comparing when you shop replacement plans is where most beneficiaries get tripped up. Medicare Advantage plans bundle your Part A hospital coverage, Part B medical coverage, and usually Part D prescription drug coverage into a single private plan. In 2026, the average Medicare Advantage premium is around $17 to $18 per month for plans that include drug coverage, but that number is almost meaningless on its own. What matters far more is the plan's Maximum Out-of-Pocket (MOOP) limit — in 2026, CMS set the MOOP cap at $9,350 for in-network services — your copays for specialist visits and hospital stays, and whether your specific doctors and hospitals are in-network. A plan with a $0 premium but a $9,000 MOOP and a narrow network may cost you far more than a plan with a $50 monthly premium and a $4,500 MOOP if you have significant health needs.

Drug coverage deserves its own careful review. When you're forced into a new plan, your current medications are not guaranteed to be covered at the same tier or cost. Each Medicare Advantage plan with drug coverage (called an MA-PD) maintains its own formulary — a list of covered drugs organized into tiers, with Tier 1 generics typically costing $0 to $5 and Tier 4 or Tier 5 specialty drugs potentially costing hundreds of dollars per month. Before you select a replacement plan, go to Medicare.gov and use the Plan Finder tool. Enter every prescription you take, including the exact dosage and frequency, and the tool will calculate your estimated annual drug costs under each plan. This step alone can reveal thousands of dollars in annual cost differences between plans that look similar on the surface.

For beneficiaries who are being forced out of Medicare Advantage entirely — either because no MA plans are available in their county or because they want more predictable costs — this disruption may actually be an opportunity to reconsider Original Medicare paired with a Medigap supplemental policy. Original Medicare (Parts A and B) covers roughly 80% of approved medical costs, and a Medigap plan covers most or all of the remaining 20%, depending on the plan letter you choose. Medigap Plan G, one of the most comprehensive options available to new enrollees in 2026, typically costs between $100 and $200 per month depending on your age, gender, and location, but it eliminates nearly all out-of-pocket costs after you meet the Part B deductible ($257 in 2026). The critical catch: Medigap plans require medical underwriting in most states, meaning insurers can charge you more or deny coverage based on your health history — unless you're in a guaranteed issue window.

If you live in one of the states with a birthday rule — California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, or Oregon — you have a 30-day window each year around your birthday to switch Medigap plans without medical underwriting. A forced disenrollment from Medicare Advantage may also trigger a guaranteed issue right in some states, meaning insurers must sell you a Medigap policy at standard rates regardless of your health. The rules here are genuinely complex and vary by state, so contacting your State Health Insurance Assistance Program (SHIP) counselor — a free, unbiased resource available in every state — is one of the smartest calls you can make right now. SHIP counselors are not insurance agents and have no financial incentive to steer you toward any particular plan.

One group that deserves special attention in this disruption: beneficiaries enrolled in Dual Eligible Special Needs Plans (D-SNPs), which serve people who qualify for both Medicare and Medicaid. These plans often provide extra benefits like dental, vision, transportation, and meal delivery that standard Medicare Advantage plans do not. If your D-SNP is being discontinued, you need to verify that any replacement plan you're considering also carries D-SNP status, because a standard Medicare Advantage plan will not provide the same Medicaid coordination benefits. Your state Medicaid office can help confirm your eligibility and identify available D-SNP options in your area.

The bottom line for 2026 is this: passivity is the most expensive choice you can make. If you've received a plan termination notice, use your SEP window actively. Compare at least three to five replacement plans on Medicare.gov's Plan Finder, focusing on your specific doctors, your specific drugs, and the MOOP limit — not just the monthly premium. If you're unsure whether Medicare Advantage or Original Medicare with Medigap is the better long-term fit for your health situation, a free SHIP counseling session can walk you through a side-by-side comparison with no sales pressure. Call 1-800-MEDICARE (1-800-633-4227) to be connected to your local SHIP office, or visit shiphelp.org to find a counselor in your state.