Balance Billing and the No Surprises Act

An in-network provider agrees to accept the plan's allowed amount as payment in full, so the difference between their charge and that amount is written off. An out-of-network provider has no such contract and may historically bill you the remainder — the "balance." That is how a patient who did everything right ends up with a five-figure bill from an anesthesiologist they never met.

The No Surprises Act prohibits balance billing for:^[1],[2]

• Emergency services at any hospital or freestanding emergency department, in- or out-of-network, including post-stabilization care until you can safely be moved.
• Non-emergency care by out-of-network providers at an in-network facility — anesthesiology, pathology, radiology, neonatology, assistant surgeons, hospitalists, intensivists, and any lab or diagnostic service ordered during the visit.
• Air ambulance services from out-of-network providers.

It applies to most employer plans (including self-funded), marketplace and individual plans. People with Medicare, Medicaid, TRICARE, Indian Health Service or VA coverage are already protected by their own rules.^[2]

Your cost sharing must be calculated as if the care were in-network, based on the recognized amount, and it must count toward your in-network deductible and out-of-pocket maximum.^[1] The provider and the plan then settle the rest between themselves — first by negotiation, then through the federal Independent Dispute Resolution process, in which the patient is not a party and has no financial exposure.^[4]

Practical test: if a bill for emergency care shows an "out-of-network balance" line on top of your normal copay and coinsurance, that line is almost certainly unlawful.

For some non-emergency, scheduled services, an out-of-network provider may ask you to waive the protection using a standard notice-and-consent form. For it to be valid it must be given at least 72 hours in advance (or three hours if you schedule same-day), include a good-faith cost estimate, and be signed voluntarily.^[1],[3]

Consent can never be requested for emergency care, or for ancillary services such as anesthesiology, pathology, radiology, neonatology, assistant surgeons, or diagnostics ordered at an in-network facility. A signature on a general admission form is not consent — the waiver must be a separate, specific document.

• Ground ambulance — the most common remaining surprise bill.
• Care you deliberately chose out-of-network with valid written consent.
• Uninsured and self-pay patients (covered instead by Good Faith Estimate rules).
• Services excluded by your plan entirely — that's a coverage fight, not a balance bill.
• Short-term limited-duration and some excepted-benefit plans.

1. Compare the provider bill against the "patient responsibility" figure on your EOB.
2. Check whether the facility was in-network on the date of service.
3. Look for an "out-of-network" or "non-covered — provider not contracted" line.
4. Confirm your cost share was applied to the in-network deductible.
5. Ask whether you signed a separate consent form — and request a copy.

Write to the billing office citing the No Surprises Act, the date of service, and the protected category. Ask the plan to reprocess the claim at in-network cost sharing, and ask the provider to withdraw the balance and hold collections. If neither moves, file a complaint with the federal No Surprises Help Desk at 1-800-985-3059 or through the CMS complaint form, and copy your state insurance regulator, which may have stronger state-level protections.^[1],[2]

Never pay a disputed balance to "stop collections" — payment weakens the dispute.