Surprise Medical Bills and the No Surprises Act

A surprise bill is what happens when you get care and later learn that part of it involved an out-of-network provider or facility you did not choose, leaving you with a bill your insurance will not cover. Since January 1, 2022, a federal law called the No Surprises Act protects you from most of these bills (CMS^[1]).

What counts as a surprise bill

Surprise billing happens when someone with insurance unknowingly, or unavoidably, receives care from an out-of-network provider or facility and is then billed directly for the difference between the out-of-network charge and what the plan pays, which the plan does not cover. That difference is called a balance bill.

The classic examples are a visit to an in-network hospital where the anesthesiologist, radiologist, or pathologist turns out to be out of network, or an emergency room trip where the doctor staffing the ER is out of network even though the hospital is in network.

What the No Surprises Act protects

The law covers three situations, per CMS^[1]:

1. Most emergency services, including care received out of network and without prior authorization.
2. Non-emergency services from out-of-network providers at an in-network facility, such as the anesthesiologist or radiologist during a covered hospital stay.
3. Air ambulance services from an out-of-network provider.

In these cases, you cannot be charged more than your plan's in-network cost-sharing amount, and the provider cannot balance bill you for the difference. You are responsible only for what you would have paid if the provider were in network.

What is not covered

Ground ambulance rides are the notable gap. The CFPB^[2] points out that ground ambulance transportation is not protected by the Act, so a surprise bill from a ground ambulance can still happen. Air ambulance is protected; ground ambulance is not.

The Act also does not broadly protect you from voluntarily choosing an out-of-network doctor for non-emergency care. In limited situations for certain non-emergency services, a provider can ask you to sign a notice and consent to be balance billed, but you have to be given clear notice and a genuine choice first (CMS^[1]). The consent is not valid for emergency care or for certain other services, so the protection holds where it matters most.

Protection when you have no insurance

The Act has a second side for people without insurance or who pay entirely out of pocket. Providers and facilities must give uninsured and self-pay patients a "good faith estimate" of what a service will cost before it is provided, including expected charges for the primary service and related services (CMS^[3]). This means you can learn the price up front instead of waiting for a bill.

That good-faith estimate also creates a dispute path: if your final bill is substantially higher than the estimate, you can ask for a patient-provider dispute resolution review.

What to do if you get one

If a surprise bill arrives, do not pay the balance first. Check whether the No Surprises Act applies to the situation, and if it does, contact your insurer and the provider, because you should only owe the in-network rate (CFPB^[2]).

If the provider or insurer will not correct it, the No Surprises Act help desk is available through CMS^[3], and you can file a complaint with the CFPB for debt-collection or credit-reporting problems tied to a surprise bill. Your state's insurance department or consumer assistance program can also intervene.

Frequently asked questions

What is a surprise medical bill? A bill for care you did not choose as out of network, usually from an out-of-network provider at an in-network facility or during an emergency (CMS^[1]).

Is balance billing illegal? It is prohibited in the situations the No Surprises Act covers: most emergency care, out-of-network providers at in-network facilities, and air ambulance (CMS^[1]).

Does the No Surprises Act cover ground ambulances? No. Ground ambulance transportation is not protected (CFPB^[2]).

Do I have to pay a surprise medical bill? Generally you owe only your in-network cost-sharing, not the balance bill, when the Act applies. Verify with your insurer and provider before paying more (CMS^[1]).

What is a good faith estimate? A written estimate of expected charges that providers must give uninsured and self-pay patients before a scheduled service (CMS^[3]).

Can I waive the No Surprises Act protections? In limited, non-emergency situations, a provider can ask you to consent to balance billing, but only with clear notice and a real choice, and the consent does not apply to emergency care (CMS^[1]).

What should I do if a provider balance bills me anyway? Do not pay the extra amount first. Contact your insurer and the provider, use the No Surprises Act help desk, and file a complaint with the CFPB if it reaches collections or credit reporting (CFPB^[2]).

Does the No Surprises Act apply to emergency room visits? Yes, including out-of-network emergency care, which is one of the central protections (CMS^[1]).

This is patient education, not financial or legal advice. Reviewed October 3, 2026.

Sources

• CMS, No Surprises: Understand your rights against surprise medical bills^[1]
• CMS, No Surprises^[3]
• CFPB, What should I do if I can't pay a medical bill^[2]
• DOL, Avoid Surprise Healthcare Expenses: How the No Surprises Act Can Help^[4]