Glossary
Balance Billing
The practice of a provider billing you for the difference between their charge and what insurance approved.
Quick answer
Balance billing means a provider charges you the gap between their full charge and what Medicare allowed. Under Medicare, balance billing is illegal for participating providers, limited to the 15% limiting charge for non-PAR providers, and unrestricted for opt-out providers.
Why it matters
Improper balance billing is one of the most common Medicare violations — and TFL beneficiaries are often targets because their secondary coverage isn't well understood by billing staff.
When you'll encounter it
When a provider's bill exceeds what the MSN and TFL EOB show you owe.
Impact on Medicare
Strictly regulated; violations should be reported to 1-800-MEDICARE.
Impact on TRICARE For Life
TFL pays the limiting-charge difference at non-PAR providers, so balance bills above that are illegal.
Common misconceptions
- "I have to pay any balance the provider bills." — No — balance billing above the limiting charge is illegal under Medicare.
Common mistakes to avoid
- Paying balance bills without checking the EOB.
- Not reporting violations.
Real-world scenario: A non-PAR provider bills you $300 above the limiting charge.
You report the violation to 1-800-MEDICARE; CMS forces the provider to refund and assesses penalties.
What should I do?
- 1Match every provider bill against the MSN and TFL EOB.
- 2Refuse to pay above the limiting charge.
- 3Report illegal balance billing to 1-800-MEDICARE.
Questions people commonly ask
Continue learning
— suggested by the knowledge graph- 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.
- 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.
- ClaimA formal request to an insurer for payment of a covered service.
- Coordination of Benefits (COB)The federal and contractual rules that determine which insurer pays first when you have more than one health plan.
- Explanation of Benefits (EOB)A statement from your insurer showing what a provider billed, what the plan paid, and what you may owe.
- 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.
- A doctor is balance-billing me. Is that legal?Medicare-participating providers cannot balance bill. Non-participating providers can charge up to the limiting charge. Opt-out providers can bill anything. Identify the type before paying.
- How much does Medicare Part B cost?Most people pay the standard Part B premium (roughly $185/month in 2026). Higher-income retirees pay IRMAA on top. Lower-income retirees may qualify for help paying it.
- 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.
- 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.
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.