Balance Billing, Explained for Providers

Before January 1, 2022, the payment math for out-of-network care was simple and brutal. The plan paid its share, the provider billed the patient for the rest, and the patient got a bill they never saw coming. The No Surprises Act ended that model: for covered services, the patient is out of the fight entirely, and the payment dispute moves to a process between the provider and the payer. This is the plain-language version of that law, written for the people who run revenue cycle.

What balance billing actually is

When a patient sees a provider who is out of network with their health plan, the plan pays what it agrees to pay. The provider then bills the patient for the difference between that payment and the full charge. That difference is balance billing.

Surprise billing is the unexpected version. It happens when the patient cannot control who provides the care: the emergency room visit, or the surgery at an in-network hospital staffed by an out-of-network anesthesiologist the patient never met. Before the law, about 1 in 5 emergency claims and 1 in 6 in-network hospitalizations included at least one out-of-network bill, according to KFF.

What the No Surprises Act changed on January 1, 2022

The No Surprises Act, passed as part of the Consolidated Appropriations Act of 2021 and signed in December 2020, put its patient protections into effect on January 1, 2022. The core rule is one sentence long: for covered services, providers and facilities may not bill the patient more than the in-network cost-sharing amount (copay, coinsurance, deductible). The health plan pays the out-of-network provider directly, and any dispute over the payment amount is settled between the plan and the provider.

The law covers three scenarios:

• Emergency services from an out-of-network provider or facility, including independent freestanding emergency departments. This includes post-stabilization services, unless the patient gives written consent under strict conditions.
• Non-emergency services furnished by an out-of-network provider at an in-network hospital or ambulatory surgical center.
• Out-of-network air ambulance services.

The protections do not extend to every payer. Medicare, Medicaid, Indian Health Services, Veterans Affairs health care, and TRICARE have their own protections and sit outside this framework.

Which services can never be balance billed, and where consent works

At an in-network facility, the law draws a hard line around eight service types: emergency medicine, anesthesia, pathology, radiology, laboratory, neonatology, assistant surgeon, hospitalist, and intensivist services. These providers cannot balance bill the patient and cannot ask the patient to give up the protection. For other services at in-network facilities, an out-of-network provider may only balance bill if the patient receives written notice and gives informed consent, in the timeframe and format the regulations require. The patient is never required to waive these protections and never required to accept out-of-network care.

What this means for revenue cycle teams

The operational shift is the point of the law. The patient is no longer the collection backstop for covered services, so your leverage moved to the payer relationship. Five things to have in place:

• A notice and consent workflow that meets the federal format and timing rules, for the services where consent is allowed at all. The eight protected specialties are off limits regardless.
• A current in-network status grid so front-end staff can spot out-of-network encounters before they become violations. Know the plans you contract with, and know when state law adds protections on top of the federal floor.
• Good faith estimates for uninsured and self-pay patients, issued before care is rendered.
• A negotiation bench. Since the patient can no longer be billed for the balance, the first move is negotiating the highest reimbursement with the insurer. IDR is the backup, not the opening bid.
• Enforcement awareness. A violation can trigger state enforcement action or federal civil monetary penalties of up to $10,000 per violation.

Where IDR fits

With the patient removed from the equation, the payment dispute is now provider versus payer. The law sets a fixed sequence. The payer makes an initial payment or denies coverage. If the provider disagrees with the amount, both sides enter a 30-business-day open negotiation period. If that fails, either side can take the dispute to federal IDR, where a certified arbitrator selects one side's final offer in a binding determination. There is no middle ground and no appeal on the merits: the number you submit is the number you live with.

That venue has become the center of out-of-network revenue strategy, and it rewards the teams that treat it as operations rather than legal theater. The full walkthrough lives here: The Federal IDR Process, Step by Step, with the 2026 deadlines, fees, and batching rules.

What the numbers say, four years in

For patients, the law did what it promised. Researchers found a 16.5 percent reduction in out-of-pocket spending for patients in states without prior balance billing protections, and the Congressional Budget Office estimated the law would reduce premiums by up to 1 percent and produce $17 billion in federal savings over a decade.

For providers, the surprise was the venue. The IDR process was expected to handle about 17,000 disputes a year and instead received 14 times the predicted volume in its first year. As of May 2026, more than 6.3 million disputes had been initiated and nearly 5.9 million resolved. The June 2026 final IDR operations rule is now tightening how that volume gets processed. The teams that built real IDR operations early are collecting what they are owed; the teams that waited are writing off money that was never the patient's to pay.