Solomon Copilot™Is balance billing illegal?
Balance billing, when an out-of-network provider bills you for the gap between their charge and what insurance paid, is now prohibited in many common situations. Knowing which ones is the difference between paying and disputing.
What balance billing is
Balance billing happens when a provider bills you directly for the difference between their full charge and the amount your insurer paid. A "surprise" balance bill is one you couldn't reasonably have avoided, like an out-of-network anesthesiologist at an in-network hospital.
When it's prohibited
Federal protections under the No Surprises Act generally prohibit surprise balance billing for emergency services, and for many out-of-network providers treating you at an in-network facility. In those situations, you typically can't be charged more than your in-network cost-sharing.
The protection only helps if you recognize a surprise bill when it lands. Many patients pay them without realizing the charge was prohibited in the first place.
When you may still owe
Protections have limits, certain services, certain settings, or situations where you knowingly waived protections in advance may fall outside the rules. State laws can add further protections on top.
What to do if you get one
Don't pay immediately. Compare the bill against your EOB, identify whether the No Surprises Act applies, and dispute in writing citing the protection. Solomon flags potential surprise-billing situations on your bill automatically.
Stop guessing. See your bill, line by line.
Solomon scans every charge against current benchmarks, flags the errors and overcharges, and writes the dispute letter they will answer.
Analyze My Bill →Common questions
What is the No Surprises Act?
A federal law that protects patients from many surprise out-of-network bills, particularly for emergency care and for out-of-network providers at in-network facilities. It generally limits your responsibility to in-network cost-sharing in those cases.
How do I know if my bill is a prohibited surprise bill?
Check whether the care was an emergency, or whether an out-of-network provider treated you at an in-network facility without your informed advance consent. If so, the balance bill may be prohibited and disputable.
Sources & further reading
Reviewed and updated 2026-05-31 by Nisha A. Kuttothara, J.D.