Tennessee Medicare, by the Numbers

Medicare Enrollment by County

Counties covered by our city pages (42 counties, 1,197,365 beneficiaries). Each links to its anchor city page.

Statewide, 53% of beneficiaries chose Medicare Advantage in 2025, more than half, so prior authorizations, network questions, and denials worth appealing come up constantly. Counties above that line see the most of it. Tennessee uses the standard federal Medigap letter plans, all regulated by the Tennessee Department of Commerce and Insurance: there is no birthday rule or annual guaranteed-issue window, so a switch outside your six-month open enrollment can be medically underwritten, which makes timing matter, and Tennessee, under a 2011 state law, does require insurers to sell Medigap to people under 65 who have Medicare because of a disability. About 10.8% of Tennessee seniors live below the poverty line, the group most likely to qualify for unclaimed help: federal Extra Help and the Medicare Savings Programs TennCare runs with income and asset limits. For the full rundown, sources included, see our Tennessee patient advocacy hub.