Balance Billing
Definition
Balance billing is when a provider bills the patient for the difference between the provider's charge and the amount the insurance payer paid. For in-network providers, balance billing is prohibited by contract. For out-of-network providers, balance billing is restricted by the No Surprises Act (effective January 2022) for emergency services and certain non-emergency services at in-network facilities. The act protects patients from unexpected out-of-network charges.
Why Balance Billing Matters
Before the No Surprises Act, patients received surprise bills averaging $750 to $2,600 for out-of-network emergency services. Providers must now resolve payment disputes with payers through independent dispute resolution (IDR) rather than billing the patient. Understanding balance billing rules prevents compliance violations and patient complaints. See balance billing regulations and No Surprises Act.
How Balance Billing Works
Provider charges $500 for a service. Payer pays $300. The $200 difference is the "balance." In-network: the provider writes off the $200 per contract. Out-of-network emergency: the provider cannot bill the patient for the $200 under the No Surprises Act — the dispute goes to IDR. Out-of-network non-emergency at OON facility: the provider can balance bill the patient if proper notice was given 72 hours in advance and the patient consented in writing.
Related Terms
Surprise billing — a type of balance billing now restricted by federal law. Out-of-network — provider status that triggers balance billing rules. Coordination of benefits — how multiple payers share costs. Explanation of benefits — the document showing what the payer paid.
Common Questions
Can a provider balance bill for elective out-of-network services?
Yes, if proper notice and consent requirements are met. The provider must give the patient a written estimate at least 72 hours before the service, and the patient must sign a consent form acknowledging they will be responsible for the balance. Without consent, the No Surprises Act protections apply.
Altair helps billing teams resolve denials faster. See how it works.
This glossary is for informational purposes. Consult official billing guidelines and payer policies for definitive definitions. Last updated: 2026-04-06.