United States: Medicare Advantage Stops at the County Line

During a summer stay in Stowe, a retiree tore a meniscus hiking; her Medicare Advantage HMO covered emergency care, but not local non-emergency follow-up treatment.
In Stowe, that meant the orthopedic visit, MRI, and preferred outpatient surgery before flying home would have been out of network under her plan.
The case shows how Medicare Advantage service areas work in Stowe stays: emergency and urgent care are covered, while follow-up treatment depends on network rules.
If you spend weeks in Stowe outside your plan's service area, review your plan's service map and out-of-network cost-sharing before scheduling care there.
For longer Stowe stays, compare a PPO or Original Medicare plus Medigap while guaranteed issue still applies, since later switching can be harder.