After the Operating Room: How to Fight a Surprise Medical Bill and Win

You scheduled the procedure. You confirmed your surgeon was in-network. You called your insurance company. You did everything right — and then, weeks after the operation, an unexpected bill arrived from an anesthesiologist, an assistant surgeon, or a pathology lab you never agreed to hire. The amount is substantial. The explanation is vague. And the clock is already ticking.

This experience is not an anomaly. It is, for millions of Americans, a predictable consequence of how healthcare billing has historically operated in the United States. Understanding the legal landscape that now governs these situations — and knowing precisely where its protections apply and where they fall short — is the first step toward an effective response.

The No Surprises Act: What Changed in 2022

The federal No Surprises Act took effect on January 1, 2022, representing the most significant legislative intervention against unexpected medical billing in the country's history. The law applies to most private health insurance plans, including those offered through employers and those purchased on the individual market, and it establishes several important baseline protections.

Under the Act, patients with qualifying insurance coverage are generally protected from receiving out-of-network bills for emergency services, regardless of which facility provides care. The law also prohibits out-of-network charges from providers — including anesthesiologists, radiologists, assistant surgeons, and other specialists — who perform services at an in-network facility without the patient's explicit advance consent to out-of-network billing.

Critically, when these protections apply, patients are required to pay only their in-network cost-sharing amounts — their deductible, copay, or coinsurance — as though the out-of-network provider were in their network. Any billing dispute between the provider and the insurer is handled through an independent dispute resolution process that does not involve the patient.

For many Americans, this represents a substantial improvement over prior law. But the No Surprises Act is not a comprehensive solution, and its limitations are significant.

Where Federal Protections Do Not Reach

The No Surprises Act applies specifically to group health plans and individual health insurance coverage regulated under federal law. Several large categories of patients fall outside its scope.

Medicare and Medicaid beneficiaries are covered by separate, pre-existing billing rules under those programs rather than the No Surprises Act. Patients enrolled in these programs should consult Medicare.gov or their state Medicaid office for applicable protections.

Uninsured and self-pay patients are not covered by the surprise billing provisions of the Act in the same way. They do, however, have a right under the law to receive a good faith cost estimate from providers before scheduled services — a protection that, while meaningful, does not carry the same enforcement weight.

Ground ambulance services were explicitly excluded from the 2022 law. This remains one of the most consequential gaps in federal consumer protection. Patients transported by ambulance — particularly in emergency situations — can still receive substantial out-of-network bills with limited federal recourse. Separate rulemaking on this issue has been under discussion but, as of this writing, has not resulted in comprehensive federal protection.

Short-term health plans and certain association health plans may not qualify as comprehensive coverage under the Act's definitions, leaving their enrollees without full protection.

The State-by-State Layer: A Patchwork of Additional Rights

Prior to federal action, more than 30 states had enacted their own surprise billing protections. In many cases, state laws provide broader or more specific coverage than the federal baseline — but they apply only to insurance plans regulated at the state level. Fully self-funded employer plans, which cover a large portion of working Americans, are regulated under federal ERISA law and generally fall outside state jurisdiction.

States including California, New York, and Texas have particularly robust surprise billing statutes that predate and, in some respects, exceed federal requirements. Patients in these states may have additional dispute resolution options or stronger cost-sharing limits. Conversely, patients in states with minimal prior legislation rely entirely on the federal framework.

To identify your state's specific rules, the National Academy for State Health Policy (NASHP) maintains a regularly updated tracker of state surprise billing laws, accessible at nashp.org.

How Providers Continue to Exploit Gaps

Despite federal law, billing irregularities persist through several documented mechanisms.

Some providers present patients with broad consent forms before procedures — sometimes embedded within standard hospital admission paperwork — that include language waiving out-of-network billing protections. The No Surprises Act does permit patients to voluntarily consent to out-of-network billing for non-emergency services with at least 72 hours' advance notice, but this exception requires clear disclosure and genuine informed consent. Patients who sign paperwork without reading it carefully may inadvertently waive protections they did not know they had.

Freestanding emergency rooms, which operate outside traditional hospital campuses, may bill at different rates and are subject to varying state-level oversight. Patients who visit these facilities — sometimes without realizing they are not standard emergency departments — have reported receiving bills inconsistent with their expectations.

Balance billing from air ambulance services, while now subject to some federal oversight following subsequent rulemaking, continues to generate consumer complaints. Patients transported by air medical services after accidents or acute medical events have faced bills exceeding $50,000 in documented cases.

Disputing an Unexpected Bill: A Step-by-Step Approach

If you receive a medical bill that you believe violates your rights, the following sequence of actions provides a structured path forward.

Step 1: Request an itemized bill. You have the right to receive a complete, line-by-line accounting of all charges. Review it carefully for duplicate charges, billing codes that do not correspond to services received, and charges for items such as facility fees that may not have been disclosed in advance.

Step 2: File a complaint with your insurer. Contact your health plan's member services department and explicitly state that you believe the bill violates the No Surprises Act or applicable state law. Request that the insurer treat the services as in-network.

Step 3: Use the federal complaint portal. The Centers for Medicare & Medicaid Services (CMS) operates a No Surprises Help Desk at 1-800-985-3059, and complaints can also be submitted online at cms.gov. Filing a formal complaint creates a record and may prompt direct intervention.

Step 4: Contact your state insurance commissioner. Even where state law does not directly govern your plan, state regulators can sometimes facilitate resolution or identify violations of applicable rules.

Step 5: Request a payment plan or financial assistance review. If a bill is ultimately found to be valid, most hospitals are required by federal tax law (if they hold nonprofit status) to have financial assistance programs. Ask explicitly whether you qualify.

Step 6: Consider professional advocacy. Patient advocates and medical billing specialists can review bills for errors and negotiate on your behalf. Nonprofit organizations including the Patient Advocate Foundation offer free case management services to eligible patients.

Before the Procedure: Protecting Yourself in Advance

The most effective protection against surprise billing is pre-procedure verification. Before any scheduled surgery or significant procedure, request written confirmation from your insurer that the facility, the operating surgeon, the anesthesiologist, and any anticipated specialists are all in-network. Ask the facility directly whether any providers who may be involved in your care operate outside your network. If you receive a good faith estimate, keep a copy.

These steps require time and persistence. They should not be necessary in a well-functioning healthcare system. But until comprehensive protections cover every American in every care setting, informed preparation remains a patient's most reliable defense.