Medicare in Tennessee
May 20, 2026
Tennessee Medicare quick facts (2026)
- Beneficiaries: Roughly 1.4 million Tennesseans are enrolled in Medicare.
- Active Advantage carriers: BlueCross BlueShield of Tennessee, Humana, UnitedHealthcare, Aetna, Cigna, WellCare, and others (Humana's corporate headquarters in Louisville, KY makes adjacent TN markets particularly contested).
- State Medicaid program: TennCare — relevant for dual-eligible coordination through D-SNPs.
- SHIP resource: Tennessee SHIP offers free counseling.
Common Tennessee Medicare questions
Q: When can I enroll in Medicare in Tennessee?
A: Federal calendar — Initial Enrollment Period around your 65th birthday; Annual Enrollment Period October 15 – December 7, 2026.
Q: Can I switch Medigap plans in Tennessee without underwriting?
A: Generally only during your federal 6-month Medigap Open Enrollment Period or a guaranteed-issue trigger. Tennessee does not have a state birthday or anniversary rule.
Q: What's TennCare?
A: TennCare is Tennessee's Medicaid program. Dual-eligibles (Medicare + TennCare) may qualify for D-SNPs that coordinate both programs.
Q: Are there any $0 premium Advantage plans in Tennessee?
A: Many Tennessee counties have $0 monthly premium Advantage plans (premiums vary by plan), though $0 premium does not mean $0 out-of-pocket — review the full cost-sharing and drug formulary.
Run the numbers for your situation: enrollment calculator · IRMAA calculator · Part D cost calculator.
Medicare in Tennessee — plans and how to compare.
What Tennessee residents should know about Medicare Advantage, Medicare Supplement, and Part D — and how plan availability differs in Tennessee.
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Medicare basics in Tennessee
Medicare is a federal program, so the core rules are the same in Tennessee as everywhere else — but the specific plans available, premiums, and carrier networks vary by ZIP code and county.
Most Tennessee residents become eligible at 65 through Social Security. See eligibility for full rules.
For the 7-month enrollment window timeline, see Turning 65.
What Tennessee residents typically compare
- Medicare Advantage — Many Tennessee counties have 20-50+ Advantage plans. Plans, premiums, and extras vary by county.
- Medicare Supplement (Medigap) — Plans are federally standardized but premium pricing and underwriting rules vary by state.
- Part D prescription drug plans — Available statewide but formularies and preferred pharmacies differ by plan.
See Advantage vs. Supplement for the side-by-side framework.
Tennessee timing rules
The federal Medigap Open Enrollment window is the same everywhere — 6 months starting the month you turn 65 AND have Part B. During that window, no medical underwriting.
Outside that window, most states (including Tennessee unless otherwise noted) allow Medigap carriers to use medical underwriting. Check Tennessee's State Health Insurance Assistance Program (SHIP) for current state-specific rules.
How to compare plans in Tennessee
- Confirm your ZIP — plans differ within Tennessee by county
- List your prescriptions and check each on the plan's formulary
- Confirm your doctors are in-network
- Compare premium + deductible + maximum out-of-pocket
- Check star ratings for plans you are weighing
- Ask about prior authorization requirements (common on Advantage)