TRICARE For Life and Medicare: How Military Retiree Coverage Works Together

Military retirees with 20 or more years of qualifying service and their dependents have access to one of the most comprehensive coverage combinations available in Medicare: TRICARE For Life paired with Medicare Parts A and B. When these programs work together, they eliminate nearly all Medicare cost-sharing, creating coverage that approaches zero out-of-pocket for covered services. But the arrangement has one non-negotiable requirement that, if ignored, costs the retiree their entire TRICARE benefit.

Bryce's Take

Every military retiree I work with eventually asks whether they really need Part B given their TRICARE coverage. The answer is almost always yes, and the reason is simple: without Part B, you lose TFL entirely. The Part B premium is the cost of admission to a benefit worth far more than $185 a month. I have never had a veteran tell me they regretted maintaining Part B.

What TRICARE For Life is

TRICARE For Life is the TRICARE plan available to Medicare-eligible military retirees and their dependents who are also eligible for Medicare. It replaces TRICARE Standard and Prime at age 65. Unlike other TRICARE plans, TFL has no enrollment fee and no monthly premium beyond what you pay for Medicare Part B. It functions as a wrap-around plan that pays after Medicare, covering most of what Medicare does not.

How the two programs coordinate

When you have both Medicare and TFL, Medicare pays first as the primary insurer. TRICARE For Life then pays secondary, covering Medicare's cost-sharing including the Part B deductible, the 20% coinsurance, and inpatient hospital copays. For most Medicare-covered services, the combination results in $0 out-of-pocket. Both programs must cover the service for TFL to pay second; if a service is not covered by Medicare, TFL may or may not cover it depending on TRICARE's own coverage rules.

The Part B enrollment requirement

Here is the critical condition: TRICARE For Life requires you to be enrolled in Medicare Part B. This is not optional. If you do not enroll in Part B at 65, or if you disenroll from Part B at any point, you lose TRICARE For Life coverage entirely. You would revert to no TRICARE coverage at all while Medicare-eligible. Given that TRICARE For Life eliminates most Medicare cost-sharing, the Part B premium of $185 per month is one of the highest-return investments a military retiree can make in their healthcare.

Prescription drug coverage with TFL

Military retirees with TRICARE For Life have access to TRICARE pharmacy benefits, which are typically more generous than Medicare Part D. TRICARE's pharmacy network includes military pharmacies (MTFs), the Express Scripts mail-order program, and retail pharmacy chains. Copays at military pharmacies and mail-order are often lower than Part D copays. Most TFL beneficiaries do not need Part D because TRICARE pharmacy coverage is creditable, meaning you can delay Part D without penalty as long as you maintain TRICARE coverage.

Military retiree navigating Medicare and TRICARE together?

The TFL and Medicare coordination is actually one of the cleaner coverage combinations in Medicare, but getting Part B right is non-negotiable. A quick call can make sure your enrollment is set up correctly.

Book a Free Call

When to use which program

For care at civilian facilities, the claim goes to Medicare first and TFL second. For care at military facilities, TRICARE handles the claim and Medicare is generally not billed. For prescriptions filled through the TRICARE pharmacy benefit, TRICARE handles payment without Medicare involvement. The coordination happens automatically once you are enrolled in both programs, you do not need to manually coordinate claims.

Dependents and TFL

Dependents of TFL-eligible retirees who are also Medicare-eligible (typically by turning 65 if they are the same age bracket) are also eligible for TRICARE For Life. They must individually enroll in Medicare Parts A and B to maintain their TFL eligibility. A younger spouse who is not yet Medicare-eligible remains on standard TRICARE coverage until they age into Medicare.

Frequently asked questions

Is TRICARE For Life free?

TFL itself has no additional premium. You pay only the Medicare Part B premium. There are no deductibles or copays for most services when both Medicare and TFL are billed together. For services not covered by Medicare, standard TRICARE cost-sharing may apply.

Can I skip Medicare Part D if I have TRICARE?

Yes. TRICARE pharmacy coverage is considered creditable coverage for Medicare Part D purposes. Military retirees can delay Part D enrollment indefinitely without penalty as long as they maintain TRICARE pharmacy coverage. If you ever lose TRICARE coverage, you have a 63-day window to enroll in Part D without penalty.

What happens if I move out of a TRICARE service area?

TRICARE For Life is available nationwide without geographic restrictions. Unlike some TRICARE plans that depend on proximity to military facilities, TFL works anywhere Medicare is accepted.

Do I need a Medigap plan if I have TRICARE For Life?

Generally no. TFL already covers what Medigap plans cover, Medicare deductibles, coinsurance, and copays. Adding Medigap on top of TFL would be redundant and unnecessary for most beneficiaries.

Bryce Casson

Licensed Independent Medicare Broker

Bryce Casson is an independent Medicare insurance broker who works with every major carrier. He does not represent any single insurer, which means his recommendations are based on what actually fits each client's situation, not on commissions or quotas.