For military retirees and their families reaching age 65, the transition to Medicare creates a unique intersection of coverage options involving TRICARE for Life (TFL) and Federal Employees Health Benefits (FEHB) plans like GEHA. At this age, Medicare Part A and Part B become the primary payer, with TFL acting as a secondary payer to fill coverage gaps. When an individual also maintains a FEHB plan, the coordination of benefits requires careful management to ensure claims are processed correctly and out-of-pocket costs remain minimized.
Understanding the Coordination of Benefits at 65
When you turn 65, the federal government mandates that Medicare becomes your primary insurance provider. For those who are eligible for TRICARE for Life, TFL serves as your Medicare supplement, covering the out-of-pocket expenses that Medicare does not pay, such as deductibles, coinsurance, and copayments.
If you also hold a GEHA health insurance plan—typically obtained through federal civilian employment or a family member's federal service—this plan does not disappear at age 65. Instead, it enters a secondary or tertiary status. Under the current coordination of benefits rules, Medicare always pays first. TRICARE for Life then acts as the second payer, and your GEHA plan functions as a third payer. While having three layers of coverage might sound redundant, it is highly effective at eliminating most out-of-pocket medical costs, provided the providers are authorized to bill these programs in the correct sequence.
Medicare Part B Enrollment: The Essential Requirement
The cornerstone of this three-tiered system is Medicare Part B. To remain eligible for TRICARE for Life, you must be enrolled in Medicare Part B, even if you are also covered by a FEHB plan like GEHA.
Many federal retirees worry that having private insurance or an FEHB plan exempts them from the Medicare Part B requirement. However, for TFL coverage, the military health system strictly requires Medicare Part B enrollment. If you fail to enroll in Part B when you first become eligible at 65, you will lose your TFL eligibility. Furthermore, you may face a permanent late enrollment penalty from Medicare, which increases your monthly Part B premium for as long as you have the coverage.
Once you have your Medicare card, you must ensure your Social Security records and the Defense Enrollment Eligibility Reporting System (DEERS) are updated. DEERS serves as the master database for your military benefits; if your status as a Medicare beneficiary is not reflected there, your providers will encounter difficulty when submitting claims.
How GEHA Functions alongside Medicare and TFL
GEHA, as a fee-for-service FEHB plan, is designed to coordinate with Medicare. When you reach 65, GEHA offers specific options for its retirees, often referred to as "GEHA Medicare Advantage" or standard coordination programs.
- Primary Payer: Medicare covers the vast majority of your hospital and outpatient costs.
- Secondary Payer: TRICARE for Life pays the remaining balances that Medicare leaves behind, including the 20% coinsurance that Medicare does not cover.
- Tertiary Payer: Your GEHA plan acts as the final buffer. In many cases, GEHA will pay toward the remaining cost-share that TRICARE for Life did not cover, effectively bringing your out-of-pocket responsibility to near zero for services covered by all three entities.
It is vital to communicate your status to your healthcare providers. When scheduling an appointment, you must present your Medicare card, your military ID (for TFL), and your GEHA member ID card. Because the billing process follows a specific hierarchy, failing to provide the secondary or tertiary insurance information at the time of service can lead to delayed claims or bills being sent to you in error.
Managing Pharmacy Benefits: The TFL and GEHA Advantage
One of the most complex areas of coordination involves prescription drugs. Medicare Part D is the standard pharmacy benefit for most seniors, but TRICARE for Life provides its own comprehensive pharmacy benefit through the TRICARE Pharmacy Program (managed by Express Scripts).
If you keep your GEHA plan, you have an additional layer of pharmacy coverage. GEHA plans generally include their own prescription drug benefits. When you fill a prescription:
- You should use the TRICARE pharmacy network to utilize TFL.
- You may present your GEHA information if the medication is covered by your GEHA formulary.
In many scenarios, you do not need to enroll in a separate Medicare Part D plan because TRICARE for Life’s pharmacy coverage is considered "creditable coverage." This means it is at least as good as the standard Medicare Part D benefit, and you will not be penalized for skipping a standalone Part D plan. Using the GEHA pharmacy benefit in conjunction with TFL often allows you to fill prescriptions at the lowest possible cost, as you can compare which plan offers the better copayment for specific medications.
Comparing Coverage Layers
The table below illustrates how these programs typically interact for a standard medical procedure or outpatient visit for a 65-year-old beneficiary.
| Payer | Role | Coverage Scope |
|---|---|---|
| Medicare (Part A/B) | Primary | Primary medical, hospital, and clinical services. |
| TRICARE for Life | Secondary | Pays the balance of Medicare-approved charges. |
| GEHA (FEHB) | Tertiary | Covers remaining cost-shares or non-covered Medicare items. |
Challenges and Common Mistakes
A frequent mistake is assuming that because you have GEHA, you do not need to coordinate with TRICARE. Some retirees attempt to use GEHA as their primary insurance, bypassing Medicare or TFL. This is almost always a financial error because Medicare and TFL together cover a significantly broader range of services with higher reimbursement rates than GEHA alone.
Another challenge involves providers who do not accept Medicare. If you visit a doctor who "opts out" of Medicare, you will be responsible for the full cost of the visit, and TFL will generally not reimburse you. Always verify that your physician is a Medicare-participating provider before scheduling your appointment, regardless of how robust your FEHA or GEHA coverage is.
Furthermore, ensure that your information in DEERS is current. If your address, phone number, or family status changes, you must notify the Defense Manpower Data Center. Inaccurate information in DEERS is the leading cause of claim rejections for TFL beneficiaries.
Maximizing Benefits through Proactive Coordination
To make the most of this combination of benefits, follow these practical steps:
- Verify Provider Participation: Always ask if a clinic accepts Medicare. If they do not, they likely will not bill TFL, and you will lose the benefit of your secondary coverage.
- Update DEERS: Confirm that your Medicare Part A and B effective dates are correctly recorded in the system.
- Review GEHA Plan Documents: GEHA periodically updates its coordination of benefits rules. Read your plan’s brochure for the current year to understand how it handles "Medicare-only" versus "Medicare and TRICARE" coordination.
- Keep All Cards Handy: Carry your Medicare card, your uniformed services ID card, and your GEHA card to every medical appointment.
- Monitor EOBs: Review your Explanation of Benefits (EOB) statements from Medicare, TRICARE, and GEHA. Ensure that if Medicare denied a portion of the claim, the secondary payer (TFL) picked it up, and the tertiary payer (GEHA) addressed any final balance.
FAQ: Questions Regarding Medicare, TFL, and FEHB
Do I have to keep my GEHA plan once I have TRICARE for Life? No, you are not required to keep your FEHB plan. Many retirees choose to drop their FEHB plan once they have TFL because TFL is essentially a full-coverage supplement to Medicare. However, some choose to keep GEHA if it provides additional benefits that TFL does not, such as specific dental or vision riders, or if they wish to maintain coverage for family members who are not yet eligible for TFL.
Will I be penalized for not having Medicare Part D? No. TRICARE for Life provides pharmacy coverage that is legally defined as "creditable." This means you can go without a Medicare Part D plan and avoid the late enrollment penalty.
What happens if GEHA and TRICARE both try to pay the same claim? There is a strictly defined order of operations. Medicare pays first, TFL pays second, and GEHA pays third. Your providers are trained to bill in this sequence. If they bill incorrectly, you may receive an incorrect bill; if this happens, contact the provider's billing office and remind them of your specific secondary and tertiary insurance statuses.
Can I use my GEHA benefits for non-Medicare-covered services? Yes. This is the primary reason many retirees keep their GEHA coverage. If a service is excluded by Medicare (such as some forms of hearing aids or specific dental procedures), your GEHA plan might cover a portion of the cost, whereas TFL would not.
Does TFL cover me if I travel abroad? Yes, TFL provides coverage overseas where Medicare does not typically apply. In these cases, TFL becomes the primary payer, and your GEHA plan may also provide supplemental coverage depending on the specific international provisions of your plan.
Next Actions for the Retiree
If you are approaching age 65 or have recently transitioned, your first task is to ensure your Medicare Part B application is processed correctly. Once your Part B start date is established, contact your GEHA representative to inform them of your transition to Medicare and TFL. Request an updated Summary of Benefits that reflects how the plan coordinates with Medicare and TRICARE in your specific location.
Finally, reach out to your primary care providers to ensure they have your updated insurance hierarchy on file. By establishing this communication early, you prevent billing cycles that could otherwise cause stress and financial disruption. If you encounter a situation where a claim remains unpaid, do not pay the bill immediately; contact your TRICARE contractor or the GEHA claims department to clarify why the coordination of benefits failed to trigger.
