Balance billing is when a provider bills you for the difference between their full charge and what your insurer paid (or allowed). In several situations that’s not allowed — and even when it is, it’s often negotiable.
When balance billing is generally prohibited
- In-network providers: their contract with your plan usually bars billing you above your cost-sharing for covered services (only the contracted rate applies).
- Surprise out-of-network situations covered by the No Surprises Act (emergencies; out-of-network clinicians at in-network facilities).
- Medicare/Medicaid: providers who accept assignment generally cannot balance-bill beyond allowed amounts.
The letter
[Your full name]
[Your address]
[City, State ZIP]
[Phone] | [Email]
[Date]
[Provider billing department]
[Billing address]
Re: Disputed balance bill
Patient: [Name, date of birth]
Account / Statement number: [number]
Insurer: [plan] Member ID: [number] Claim #: [number]
Date(s) of service: [dates]
To the billing department:
You are billing me $[amount], which appears to be the difference between your
charge and what my insurer paid or allowed - a balance bill. I do not believe
this balance is properly owed because:
[ Choose what applies: ]
- You are an in-network provider, and your contract with [insurer] limits my
responsibility to my cost-sharing on the allowed amount; or
- This is a surprise out-of-network bill protected by the No Surprises Act; or
- [Medicare/Medicaid] rules limit what I can be billed for this service.
Please adjust my balance to the amount I actually owe under the applicable rule
(my in-network cost-sharing / the contracted or allowed amount) and send a
corrected statement. Please hold collection activity while this is corrected.
I'll promptly pay the correct amount once the bill is fixed.
Sincerely,
[Your signature]
[Your printed name]
How to send it
Send to the provider’s billing department and keep copies. If they’re in-network and still balance-bill you, your insurer can help enforce the contract — call member services and ask them to contact the provider. For surprise bills, you can also report to the No Surprises Help Desk (1-800-985-3059).
Notes. If balance billing is legally allowed in your case (some out-of-network, non-surprise situations), this letter won’t void the debt — but the amount is usually still negotiable; pivot to the negotiate-a-lower-bill or financial assistance letters. General information, not legal advice; rules vary by state and plan.