UnitedHealthcare, Humana & Aetna Cut Medicare Advantage Plans for 2026

Three of the biggest names in Medicare Advantage — UnitedHealthcare, Humana, and Aetna — are pulling back their plan footprints for 2026 in a significant industry retreat that will directly affect hundreds of thousands of Medicare beneficiaries across the country. The scale-backs involve exiting specific counties, dropping certain plan types like PPOs or Special Needs Plans in select markets, and in some cases reducing supplemental benefits that had become a selling point in recent years. If you are currently enrolled in a Medicare Advantage plan from any of these three carriers, you need to pay close attention to your mail this fall and take action before December 7, 2025 — the close of the Annual Enrollment Period.

The driving force behind these pullbacks is financial. Medicare Advantage insurers are paid a fixed monthly rate by the federal government for each enrollee, and that rate is set by the Centers for Medicare & Medicaid Services (CMS) based on a complex formula tied to local fee-for-service Medicare costs and a risk-adjustment model. In recent years, CMS has tightened that risk-adjustment model, clawing back payments that auditors found were inflated by diagnosis coding practices. At the same time, actual medical utilization — meaning how often enrollees are using hospitals, specialists, and post-acute care — surged after the COVID-19 pandemic, squeezing insurer margins. Humana, in particular, flagged significant medical cost pressures in its earnings disclosures, and UnitedHealthcare has faced scrutiny over prior authorization practices that drew Congressional attention. When the math stops working in a given county or region, large insurers exit rather than absorb losses.

For beneficiaries, the most immediate concern is what happens if your current plan is discontinued. Federal rules require your insurer to send you a written notice of non-renewal by October 2, 2025 — before the Annual Enrollment Period even opens on October 15. That notice triggers a Special Enrollment Period that allows you to switch to a new Medicare Advantage plan or return to Original Medicare (Parts A and B) and, if you choose, add a standalone Part D prescription drug plan. This SEP runs through the end of February in the year the plan terminates. However, waiting until February is risky — the best plans in your area may fill or change their terms, and if you want a Medigap (Medicare Supplement) policy to pair with Original Medicare, you may face medical underwriting unless you act quickly. The guaranteed issue window for Medigap when leaving a Medicare Advantage plan is typically 63 days from the date your coverage ends.

The geographic impact of these pullbacks is uneven, and that matters enormously. Rural counties and lower-income urban markets tend to be the first places large insurers exit because the per-enrollee payment rates don't cover costs as reliably as in high-density suburban markets. If you live in a rural area and UnitedHealthcare or Humana was one of only two or three Medicare Advantage options available to you, losing one carrier could leave you with very limited choices — or in some counties, no Medicare Advantage plans at all. In that scenario, returning to Original Medicare with a Part D drug plan and a Medigap policy may actually provide more stable, predictable coverage than whatever thin Medicare Advantage options remain. Original Medicare covers care from any provider nationwide who accepts Medicare, which is roughly 93% of non-pediatric physicians, and has no network restrictions.

For those who want to stay in Medicare Advantage, the 2026 Annual Enrollment Period — October 15 through December 7, 2025 — is the window to act. During AEP, any Medicare beneficiary can switch from one Medicare Advantage plan to another, switch from Medicare Advantage back to Original Medicare, or change their Part D drug plan. Coverage changes made during AEP take effect January 1, 2026. There is also the Medicare Advantage Open Enrollment Period from January 1 through March 31, 2026, during which enrollees already in a Medicare Advantage plan can make one additional switch — but this period cannot be used to enroll in a Medigap plan with guaranteed issue rights, so it is not a substitute for acting during AEP if your situation is complex.

When comparing replacement plans, look beyond the monthly premium — which can range from $0 to over $100 per month in 2026 depending on your market — and focus on the out-of-pocket maximum, which CMS caps at $9,350 for in-network costs in 2026 for standard Medicare Advantage plans. A plan with a $0 premium but an $8,000 in-network out-of-pocket maximum is a very different financial proposition than one with a $45 monthly premium and a $4,500 cap, especially if you have ongoing health conditions. Also verify that your specific doctors, hospitals, and any specialists you see regularly are in the new plan's network. Medicare Advantage plans use provider networks — HMOs require you to stay in-network for non-emergency care, while PPOs allow out-of-network care at higher cost-sharing. With major insurers shrinking, the remaining plans in your area may have narrower networks than you're used to.

Prescription drug coverage deserves its own scrutiny during this transition. Medicare Advantage plans that include drug coverage (called MA-PD plans) have their own formularies — the list of covered drugs and the tier at which they're covered. When switching plans, pull up the formulary for any plan you're considering and check every medication you take, including the tier placement and any prior authorization or step therapy requirements. A drug that costs you $10 per month under your current plan could cost $85 or more under a different plan's formulary structure. The Medicare Plan Finder tool at Medicare.gov allows you to enter your specific medications and compare estimated annual drug costs across all plans available in your zip code — this is the single most useful tool available to you during enrollment season.

Supplemental benefits — the dental, vision, hearing, fitness memberships, and over-the-counter allowances that Medicare Advantage plans added aggressively in recent years — are also being trimmed industry-wide for 2026. CMS has tightened the rules around what qualifies as a covered supplemental benefit, and insurers facing margin pressure are cutting extras before they cut core medical benefits. If you enrolled in a particular plan partly because of a generous dental allowance or an OTC card, verify whether those benefits are continuing in any replacement plan you consider. A $500 annual dental benefit has real dollar value for someone managing dentures, crowns, or periodontal care — it should factor into your total cost comparison.

If you need help navigating these changes, your State Health Insurance Assistance Program (SHIP) offers free, unbiased counseling from trained volunteers who have no financial stake in which plan you choose. Unlike insurance brokers, SHIP counselors are not paid commissions. You can find your local SHIP contact through Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227). Many SHIP programs begin scheduling AEP appointments in September, and slots fill quickly — calling in late September or early October rather than waiting until November gives you more options and more time to make a thoughtful decision before the December 7 deadline.