TRICARE for Life: The Medicare Part B Requirement

The TRICARE for Life and Medicare Part B Requirement

The TRICARE for Life and Medicare Part B requirement is simple: you must be enrolled in both Medicare Part A and Medicare Part B to use TFL. TRICARE for Life (TFL) is a premium-free Medicare wraparound benefit for Medicare-eligible uniformed service retirees and their eligible family members. Drop Part B for any reason and TFL coverage ends the same day, with no grace period.

Part B carries a monthly premium, $185 at the standard rate in 2026, while TFL itself charges no additional premium. For most military retirees, paying Part B is the entry cost for a coverage pairing that leaves very little left to pay out of pocket.

How TRICARE for Life Works With Medicare

TFL acts as a secondary payer. Medicare processes each claim first and pays its share, then TFL covers most of what remains for covered services. According to Medicare.gov, the standard Part B premium is $185 per month in 2026, and the annual Part B deductible is $257.

• Hospital stays (Part A): Medicare pays its portion and TFL typically covers the Part A deductible ($1,676 per benefit period in 2026) and any remaining cost-sharing.
• Doctor visits and outpatient care (Part B): After the $257 annual deductible, Medicare pays 80 percent and TFL generally covers the remaining 20 percent coinsurance.
• Care outside the United States: TFL provides coverage abroad where original Medicare generally does not pay, a meaningful advantage for retirees who travel or live overseas.

You do not need a referral under TFL and can see any provider who accepts Medicare. Claims are usually filed automatically after Medicare adjudicates the claim, so there is rarely paperwork to handle yourself.

Providers bill Medicare first at every visit, then TFL pays the remainder. If your card is lost or damaged, that billing order can stall, so it helps to know how to complete a Medicare card replacement before it becomes a problem.

Who Qualifies for TRICARE for Life

According to TRICARE's official eligibility guidance, TFL is available to:

• Uniformed service retirees, including National Guard and Reserve retirees who qualify for retired pay, and their eligible family members who have Medicare Parts A and B
• Certain medically retired service members and their eligible dependents who are entitled to Medicare
• Surviving spouses and dependent children who are Medicare-entitled
• Medal of Honor recipients and their families who qualify for Medicare

TFL enrollment is not something you apply for separately. Once you have Medicare Parts A and B and are registered in the Defense Enrollment Eligibility Reporting System (DEERS), TRICARE enrollment is automatic. Reviewing how Medicare coordinates with veterans benefits before you turn 65 helps make sure nothing falls through the cracks.

What Happens If You Drop or Lose Part B

If you voluntarily disenroll from Medicare Part B, or miss a required enrollment window, TFL coverage ends on the same date Part B ends. There is no grace period and no alternative TFL plan for beneficiaries who lack Part B.

Getting back into Part B is possible but restrictive. You can only re-enroll during the Medicare General Enrollment Period (January 1 through March 31 each year), with coverage starting July 1. That creates a gap of several months without TFL. A late enrollment penalty may also permanently raise your Part B premium if you went without qualifying coverage for an extended stretch.

Part B premiums are typically deducted automatically from your Social Security or military retirement payment, which can make them easy to overlook. Keeping an eye on that deduction each month helps you catch any disruption before it affects your TFL coverage.

TFL and Other Coverage Combinations

Military retirees under 65 typically use TRICARE Prime or TRICARE Select. When you turn 65 and qualify for Medicare, TFL automatically replaces those plans, provided you have enrolled in Part B. No action beyond confirming your Part B enrollment and DEERS record is usually needed.

TFL is often compared to a Medicare Supplement (Medigap) plan because both wrap around original Medicare to reduce out-of-pocket costs. The difference: TFL charges no plan premium beyond Part B, while Medigap plans carry their own monthly premium. For eligible retirees, TFL often provides stronger financial protection at a lower cost.

If you or your spouse also qualify for Medicaid, the coordination order changes: Medicare pays first, TFL pays second, and Medicaid may cover remaining costs. If you think you might qualify for Medicaid cost-sharing assistance, it is worth investigating separately, since these programs do not conflict with TFL. Because TFL covers most out-of-pocket costs, many beneficiaries find they do not need a separate Part D drug plan; the TRICARE pharmacy benefit often provides comparable or better drug coverage, especially at military pharmacies.