How Medicare and TRICARE For Life claims are paid

One of the most reassuring things about TFL is that you almost never have to think about how claims get paid. The system runs in the background, and most of the time your only involvement is presenting both ID cards at check-in.

This lesson explains exactly how the crossover works, what each document means, and what to do in the rare case something doesn't process correctly.

The crossover system

Medicare and WPS (the TFL claims processor) share data electronically. Here is the full lifecycle of a typical claim:

1. You see a Medicare-participating provider and present both your Medicare card and Uniformed Services ID.
2. The provider submits the claim to Medicare. This happens electronically the same day or shortly after the visit.
3. Medicare adjudicates the claim — applying the Medicare-approved amount and deductibles.
4. Medicare pays its share directly to the provider (usually 80% of the approved Part B amount).
5. The Medicare system electronically forwards ("crosses over") the claim to WPS — same day.
6. WPS adjudicates the secondary claim and pays the remaining Medicare cost-share (deductible plus 20% coinsurance) directly to the provider.
7. You receive a Medicare Summary Notice (quarterly) and a TFL Explanation of Benefits from WPS (typically within 30 days).
8. Your patient responsibility is $0 for services covered by both programs at participating providers.

What each document looks like

Medicare Summary Notice (MSN)

Issued by Medicare every three months (quarterly). It lists every service Medicare processed in that period, what Medicare approved, what Medicare paid, and what TFL or another secondary insurer is expected to cover.

Important fields:

• Amount Provider Charged — the provider's billed rate
• Medicare-Approved Amount — the negotiated rate
• Medicare Paid — Medicare's share
• Maximum You May Be Billed — what could fall to you (TFL typically covers this)

TFL Explanation of Benefits

Issued by WPS, usually within 30 days of the visit. Mirrors the Medicare data and shows:

• The Medicare-approved amount
• The amount Medicare paid
• The amount WPS (TFL) paid
• Your responsibility — typically $0

If the "Your responsibility" line shows $0 on both the MSN and TFL EOB, the system worked correctly and you owe nothing.

When a claim might NOT crossover

Most claims crossover automatically. The exceptions:

• A provider who is not enrolled in electronic crossover (rare for established practices).
• Care received outside the U.S. that Medicare did not pay on.
• A service that Medicare denied but TFL may still cover.
• A claim with a coding error that Medicare rejected before forwarding.

Filing a manual claim with WPS

If TFL did not pay automatically, you (or the provider) can file a manual claim. From the TFL Handbook:

1. Get an itemized bill from the provider showing services, codes (CPT/HCPCS), diagnoses (ICD-10), dates, and amounts.
2. Get a copy of the Medicare EOB for the same service (if Medicare processed the claim).
3. Complete the DD Form 2642 (Patient's Request for Medical Payment).
4. Mail to: WPS / TRICARE For Life, P.O. Box 7890, Madison, WI 53707-7890.
5. Keep copies of everything.

Claims processing typically takes 30 days.

Disputing an incorrect EOB

If you believe a claim was processed incorrectly:

• For Medicare errors: follow the appeal instructions printed on your MSN. The first level is "Redetermination."
• For TFL errors: call WPS at 1-866-773-0404 or follow the appeal instructions on the TFL EOB.

Always start with a phone call — most issues are coding errors that a single conversation resolves.

Keep your records

Save every MSN and every TFL EOB for at least one year. If a provider sends a surprise bill 6 months after a visit, the EOBs are your proof that the claim was paid correctly and the bill is a billing error.

Continue learning

— suggested by the knowledge graph

Lessons

• Understanding Original Medicare (Parts A & B) for veteransExactly what Part A and Part B cover, what they cost in 2026, and why both are required to keep TRICARE For Life.
• What is TRICARE For Life? The complete guide for retired militaryThe Medicare-wraparound benefit you earned through service — what it covers, who qualifies, what it costs, and how it activates.
• Using military hospitals and clinics (MTFs) after age 65What changes about Military Treatment Facility access once you become Medicare-eligible — and how to plan for the transition.

Encyclopedia

• Medicare Part BThe medical insurance side of Original Medicare — covers doctor visits, outpatient care, preventive services, and durable medical equipment.
• Medicare Part C (Medicare Advantage)An optional, all-in-one alternative way to get your Medicare benefits — delivered through a private plan instead of through Original Medicare.
• TRICARE For Life (TFL)The wraparound secondary health coverage for Medicare-eligible military retirees, spouses, and survivors — no premium, no enrollment fee.
• WPS (TFL Claims Contractor)Wisconsin Physicians Service — the Defense Health Agency contractor that processes TRICARE For Life secondary claims.
• Medicare AssignmentA provider's agreement to accept Medicare's approved amount as full payment for a covered service.
• Military Treatment Facility (MTF) & Space-Available CareDoD military hospitals and clinics — at 65, retirees can only be seen if appointments aren't needed by active duty or TRICARE Prime enrollees.
• MedicareThe federal health insurance program for people 65+, certain younger people with disabilities, and people with ESRD or ALS.
• TRICAREThe Department of Defense's worldwide health-care program for uniformed service members, retirees, and their families.
• DeductibleThe amount you must pay out-of-pocket for covered services before your insurance starts paying.
• CoinsuranceYour percentage share of a covered service — typically 20% under Medicare Part B.

FAQs

• Who pays first, Medicare or TRICARE For Life?Medicare pays first for any service it covers. TFL pays second. The claim usually crosses over automatically — you should never pay out of pocket up front.
• I have other insurance besides Medicare and TFL. Who pays first?Order varies. Active-employment group insurance pays before Medicare; retiree coverage like FEHB pays after Medicare and usually before TFL. TFL is almost always last.
• How does the Medicare-to-TFL claim crossover work?Medicare processes the claim, pays its share, and electronically forwards it to WPS using your sponsor SSN. WPS pays TFL's share directly to the provider — usually within 2–3 weeks.
• How long do I have to file a paper TFL claim?You have one year from the date of service to file a TFL claim with WPS. Three years for overseas claims. File ASAP after Medicare processes its part.
• What is a Medicare Summary Notice (MSN)?A quarterly summary from Medicare listing every claim filed under your number — what Medicare approved, paid, and what you may owe. Compare it against your WPS TFL EOBs.
• Medicare denied a service. Can I appeal?Yes. The first level for Original Medicare is a Redetermination filed with the Medicare Administrative Contractor (MAC) within 120 days of the denial notice (MSN).