Glossary
Claim
A formal request to an insurer for payment of a covered service.
Quick answer
A claim is an electronic or paper document a provider (or beneficiary) submits to an insurer detailing what service was provided, when, where, and at what billed amount. Medicare claims flow through Medicare Administrative Contractors (MACs); TFL claims flow through WPS.
Why it matters
Most of what determines whether you owe $0 or $1,000 happens silently inside the claims pipeline. Understanding the lifecycle helps you intervene at the right moment.
Why this matters at age 65
MTF care never required a claim. After 65, every medical interaction generates one.
When you'll encounter it
After every covered visit, procedure, lab, or prescription fill.
Impact on Medicare
Medicare processes the claim under its fee schedule and rules, then forwards (crosses over) to TFL.
Impact on TRICARE For Life
WPS processes the secondary TFL portion automatically in most cases.
Common misconceptions
- "I have to file my own claims." — Providers are required by law to file Medicare claims for you.
Common mistakes to avoid
- Paying providers before claims have run their full course.
- Not following up when a claim disappears from the MSN.
Real-world scenario: A claim was never received by Medicare after a hospital visit.
The patient calls the hospital's billing office; the claim is refiled, then crosses over to WPS within 30 days.
What should I do?
- 1Track claims in MyMedicare.gov.
- 2If a claim isn't showing up 30 days after service, contact the provider's billing office.
- 3For overseas care, file paper claims with WPS using DD Form 2642.
Questions people commonly ask
Continue learning
— suggested by the knowledge graph- How Medicare and TRICARE For Life claims are paidThe mechanics of the Medicare-to-TFL crossover system — what providers do, what WPS does, and what to do if a claim gets stuck.
- 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.
- Enrolling in Medicare: timing, methods, and the military-specific rulesWhen and how to sign up for Medicare Parts A and B — and the timing that protects your TRICARE For Life activation.
- Balance BillingThe practice of a provider billing you for the difference between their charge and what insurance approved.
- Billing ErrorsMistakes — accidental or intentional — on Medicare or TFL claims, ranging from duplicate charges to outright fraud.
- Coordination of Benefits (COB)The federal and contractual rules that determine which insurer pays first when you have more than one health plan.
- Medicare Summary Notice (MSN)Medicare's quarterly statement listing every Part A and Part B claim processed for you — Medicare's version of an EOB.
- Non-Network PharmacyA civilian pharmacy that is NOT contracted with Express Scripts — highest cost and usually requires you to pay up front and file a claim.
- Primary PayerThe insurance plan that pays first on a claim, before any other coverage is considered.
- Secondary PayerThe insurance plan that pays after the primary plan, covering remaining eligible cost-shares.
- 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.
- Why did I get a bill if I have Medicare and TFL?Usually because the claim didn't cross over, DEERS is out of date, the provider doesn't accept Medicare, or the service isn't covered. Don't pay until you understand which one.
- Do I have to file claims myself?Almost never. Medicare and TFL claims cross over automatically. The exceptions are non-network pharmacy, overseas care, and providers who opt out of Medicare.
- 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.
- 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.
Related glossary terms
Related Official Resources
Continue learning straight from the source. Every link below goes to an official government or DoD resource.
Last reviewed January 2026 against the 2026 Medicare & You and TRICARE For Life handbooks.