The No Surprises Act: What Patients Are Entitled To
The No Surprises Act, which took effect on January 1, 2022, is one of the most consequential federal billing reforms in a generation — a direct response to the phenomenon of patients receiving enormous, unexpected bills from providers they never knowingly chose. It applies to most private health insurance plans and to a specific, well-defined set of clinical situations. Knowing exactly where the law applies, and where it stops, is the difference between disputing a bill successfully and paying one you didn't have to.
Definition and scope
Before 2022, a patient could walk into an in-network hospital for a scheduled surgery, have everything go smoothly, and still receive a bill for thousands of dollars from the anesthesiologist — who turned out to be out-of-network and had no obligation to honor the patient's insurance rates. This wasn't a glitch. It was standard practice.
The No Surprises Act, enacted as part of the Consolidated Appropriations Act of 2021 (Public Law 116-260), addresses this directly. It prohibits balance billing — the practice of billing a patient for the difference between a provider's charge and what insurance pays — in three primary circumstances:
- Emergency services at any facility, regardless of whether the provider or facility is in-network
- Non-emergency services at an in-network facility when the patient had no meaningful choice of provider (for example, an out-of-network specialist at an in-network hospital)
- Air ambulance services provided by out-of-network carriers
The law covers employer-sponsored plans, individual and family marketplace plans, and grandfathered group health plans. It does not cover Medicare or Medicaid — those programs have separate billing protections — and it does not apply to ground ambulance transport, which remains a notable and unresolved gap.
How it works
When a patient receives care that falls under the Act, the insurer and the out-of-network provider negotiate payment between themselves. The patient's cost-sharing — deductibles, copays, coinsurance — is calculated as if the provider were in-network. That's the structural core of the protection: the patient is removed from the financial dispute entirely.
Providers are required to deliver a good faith cost estimate to uninsured or self-pay patients before scheduled services, under a parallel provision called the right to a good faith estimate. This estimate must be provided at least 3 business days before the appointment if scheduled 3 to 9 days out, or 1 business day in advance if scheduled the same day or the day before (CMS, No Surprises Act overview).
If an out-of-network provider and an insurer cannot agree on payment, they enter a federal independent dispute resolution (IDR) process — essentially binding arbitration. The patient is not a party to this arbitration. The arbitrator selects either the insurer's offer or the provider's offer (a "baseball arbitration" structure), and the decision is final.
One nuance worth flagging: the Act also requires providers to give written notice and obtain consent before balance billing in certain non-emergency situations where an out-of-network provider is genuinely optional. If the provider follows that consent process and the patient knowingly agrees, the balance bill may be permitted.
Common scenarios
Understanding the Act in practice means seeing where it applies and where patients assume it applies but it doesn't.
Covered:
- An in-network hospital ER treats a patient; the radiologist reading the scans is out-of-network — the patient pays in-network cost-sharing only
- A patient has knee surgery at an in-network surgical center; the assisting surgeon is out-of-network — same protection applies
- An out-of-network air ambulance transports a patient following a highway accident — balance billing is prohibited
Not covered:
- A patient voluntarily schedules an appointment with an out-of-network specialist at a freestanding out-of-network clinic — the Act doesn't apply
- Ground ambulance billing — this falls outside the law's scope, and emergency medical treatment rights under EMTALA cover a different issue entirely
- A provider at an out-of-network facility where the patient had a genuine, documented choice to go in-network
The distinction between "patient had no meaningful choice" and "patient chose an out-of-network provider" carries a lot of legal weight.
Decision boundaries
When a bill arrives that looks like it may violate the Act, the resolution path runs through specific channels. Patients with private insurance should first contact their insurer, who is required under the Act to apply in-network cost-sharing. If the insurer doesn't comply, a complaint can be filed with the Department of Health and Human Services or the Department of Labor, depending on the plan type (HHS complaint portal).
For uninsured patients who received a bill that substantially exceeds a good faith estimate — by more than $400 — there is a patient-provider dispute resolution process separate from the insurer IDR track. This process allows the patient to contest the bill directly.
The law does not resolve every billing dispute. It doesn't cap what out-of-network providers can charge insurers, only what they can charge patients. It doesn't address the broader issue of insurance denials, where coverage is refused before a bill is even generated. And it coexists with a patchwork of state patient rights laws — 33 states had some form of surprise billing protection before 2022, and state law applies in some fully insured employer plan contexts.
The Act is a floor, not a ceiling. What it does with precision is remove the patient from a financial fight that was never theirs to begin with — and for the situations it covers, that precision matters considerably.