TRICARE and Turning 65: Medicare & TFL Guide (2026)
Turning 65 is a major milestone for TRICARE beneficiaries because it marks the transition from standard TRICARE plans to **TRICARE For Life (TFL)**. To keep your TRICARE coverage, you must enroll in Medicare Part A and Medicare Part B; once active, TFL acts as a secondary payer to Medicare, often resulting in zero out-of-pocket costs for covered services.
*Note: TRICARE.com is an independent reference site and is not the official TRICARE program or a government agency. For official policy, visit TRICARE.mil.*
In detail
When you turn 65, your TRICARE coverage undergoes a fundamental shift. You move from a managed care or PPO model (like TRICARE Prime or Select) into a supplemental model called TRICARE For Life.
### The Medicare Mandate To remain eligible for TRICARE after age 65, federal law requires you to have Medicare Part A (Hospital Insurance) and Medicare Part B (Medical Insurance). * **Medicare Part A:** Usually premium-free if you or your spouse paid Medicare taxes for at least 10 years. * **Medicare Part B:** Requires a monthly premium. For 2026, this amount varies based on income — check with the Social Security Administration for the current standard premium.
If you do not sign up for Medicare Part B, you will lose your TRICARE coverage entirely.
### How TRICARE For Life Works TFL is "wraparound" coverage. In most cases, you do not pay enrollment fees for TFL. * **Medicare-covered services:** Medicare pays first, and TFL pays the remaining coinsurance and deductible. * **TRICARE-covered services (not Medicare):** TFL pays the same way a standard TRICARE plan would. * **Services not covered by either:** You pay the full cost.
### The Transition Timeline 1. **6–9 Months Before 65:** Ensure your information is correct in DEERS (Defense Enrollment Eligibility Reporting System). 2. **Initial Enrollment Period:** This begins 3 months before your 65th birthday month. Sign up for Medicare Part A and B through Social Security. 3. **Birthday Month:** TFL coverage begins automatically on the first day of the month you turn 65 (if your birthday is the 1st, coverage begins the 1st of the previous month).
### Pharmacy Benefits Your pharmacy benefit does not change significantly. You still use the **Express Scripts** pharmacy benefit. You do *not* need to purchase a Medicare Part D prescription drug plan; TRICARE’s pharmacy benefit is considered "creditable coverage" and is generally more robust than Part D.
### Regional Contractors While Medicare becomes your primary payer, your TRICARE region still determines certain administrative support: * **East Region:** Managed by Humana Military. * **West Region:** Managed by TriWest Healthcare Alliance.
## Who this applies to * **Retirees:** Must transition to TFL to keep military health benefits. * **Spouses:** Each individual transitions at age 65. A younger spouse stays on TRICARE Prime or Select until they reach 65. * **Medically Retired Veterans:** If receiving TRICARE benefits, they must transition to TFL upon reaching Medicare age. * **Survivors:** Eligible surviving spouses must enroll in Medicare Part B at age 65 to remain TRICARE-eligible.
Common scenarios
### Scenario 1: The Standard Transition John turns 65 in August 2026. He signs up for Medicare Part A and B in May. On August 1, his TRICARE Select coverage ends and TRICARE For Life begins. He goes to a doctor who accepts Medicare. The bill is $150. Medicare pays roughly 80%. TFL pays the remaining 20%. John’s out-of-pocket cost is **$0**.
### Scenario 2: Missing the Window Sarah forgets to enroll in Medicare Part B when she turns 65. On her birthday, her TRICARE coverage is suspended in DEERS. She must wait for the Medicare General Enrollment Period (January–March) to sign up, and she may face a permanent Part B late-enrollment penalty. During the gap, she has no TRICARE coverage.
### Scenario 3: Working Past 65 Robert is 65 but still working and has employer-sponsored health insurance. He can delay Medicare Part B without a penalty because he has "Group Health Plan" coverage based on active employment. He will remain on his current TRICARE plan (if Active Duty) or transition later. *Note: Retirees in small-business plans should consult TRICARE.mil as rules for small employers differ.*
## Related terms * **DEERS:** The database that tracks your eligibility for military benefits. * **TRICARE For Life (TFL):** Medicare-wraparound coverage for TRICARE-eligible beneficiaries who have Medicare Part A and B. * **Medicare Part B:** The medical insurance portion of Medicare that requires a monthly premium. * **Express Scripts:** The company that manages the TRICARE pharmacy benefit. * **T-5 Contract:** The current TRICARE contract (effective 2025) which transitioned the West Region to TriWest Healthcare Alliance.
## Sources * TRICARE.mil - Turning 65: https://www.tricare.mil/LifeEvents/BecomingMedicareEligible * Medicare.gov - Getting Started: https://www.medicare.gov * Social Security Administration (SSA): https://www.ssa.gov/medicare * Defense Manpower Data Center (DEERS): https://idco.dmdc.osd.mil/idco/