How TRICARE for Life works with Original Medicare

Medicare is primary. TFL is secondary.

Once you're eligible, you enroll in Medicare Parts A & B, and Original Medicare and TRICARE combine into TRICARE for Life. In practice your provider bills Medicare, Medicare pays its share and forwards the claim electronically to TFL, and TFL pays the rest for covered services. You never file anything for Medicare-participating care — the crossover is automatic.

What it means day to day

• Works like a Supplement — Medicare pays first, TFL fills the gaps, including the $1,736 Part A deductible and the 20% Part B coinsurance
• No additional premium beyond your Medicare Part B
• Any provider who accepts Medicare — no networks, no referrals, no prior authorizations on the medical side
• No copays or coinsurance for services covered by both programs
• Creditable drug coverage through Express Scripts
• $3,000 per-family annual catastrophic cap on TRICARE-covered out-of-pocket costs, per calendar year

The fine print lives in the seams between the programs: a service Medicare covers but TRICARE doesn't (chiropractic care is the classic) leaves you with Medicare's normal cost-sharing, and a service TRICARE covers but Medicare doesn't — most importantly care overseas — pays under TRICARE's rules with its deductible and cost-shares. The cost matrix guide maps all four combinations.

Why TFL + Original Medicare is the benchmark

This pairing is, frankly, some of the strongest retiree coverage in America: freedom of any Medicare provider, near-zero cost-sharing, drug coverage with no gap, and worldwide backup. It's why the honest answer to "should I buy a Medigap policy on top?" is almost always no, and why moving to a Medicare Advantage plan deserves careful thought before you trade network-free wraparound for plan extras.