Patient responsibility / balance billing

Patient responsibility covers every dollar a patient owes once a claim is adjudicated: the deductible applied to that date of service, any coinsurance percentage, and fixed copayments. These amounts appear on the Explanation of Benefits (EOB) under standardized adjustment codes—PR-1 for deductibles, PR-2 for coinsurance, PR-3 for copays. If a service is not covered by the plan at all, the patient bears 100% of that cost, and the provider may bill the full charge.

Balance billing is distinct: it is the act of billing a patient for the gap between a provider's full charge and the amount an insurer actually paid or contracted to pay. When a contracted (in-network) provider accepts a payer's fee schedule, the write-off of that gap is contractually required—collecting it from the patient constitutes a contract violation. For out-of-network providers, balance billing was historically common but is now heavily restricted by the No Surprises Act (Title I of the Consolidated Appropriations Act, 2021).

Under the No Surprises Act, balance billing is prohibited in three core scenarios: emergency care at any facility regardless of network status; non-emergency care delivered by an out-of-network provider at an in-network facility (covering anesthesia, radiology, laboratory, assistant surgeons, hospitalists, and intensivists among others); and out-of-network air ambulance services. In protected situations, the patient's cost-sharing is calculated as if the provider were in-network. A limited notice-and-consent exception exists for certain elective non-emergency, non-ancillary services, but the written notice must be delivered at least 72 hours before a scheduled appointment, and the exception cannot be used to override protections for ancillary services or care arising from unforeseen urgent needs.

Miscalculating or misrepresenting patient responsibility directly affects claim integrity, patient trust, and legal exposure. If a contracted orthopedic practice collects the balance above its negotiated rate, it violates the payer contract and risks recoupment or termination. If an out-of-network orthopedic surgeon or anesthesiologist balance-bills a patient for a procedure performed at an in-network ASC or hospital—without a fully compliant 72-hour notice-and-consent process—the practice is in violation of the No Surprises Act and subject to federal enforcement action, including civil monetary penalties. Conversely, failing to collect legitimate cost-sharing (deductibles, copays) from patients can constitute insurance fraud under anti-kickback and false-claims frameworks. Getting this calculation wrong in either direction creates audit risk, payer-contract risk, and reputational risk simultaneously.