These are the health insurers that quit Medicare Advantage Modern HealthcareChanges coming to Medicare Advantage plans in 2026; providers withdrawing, scaling back plans WMURUnitedHealthcare, Humana, Aetna scale back Medicare Advantage plans for 2026 Healthcare DiveMajor health insurers scaling back Medicare Advantage offerings in 2026 Fox BusinessUnitedHealth to exit Medicare Advantage plans in 109 US counties Reuters