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Is Your Surprise Medical Bill Illegal?

The federal No Surprises Act bans many kinds of surprise billing — but most patients never check. Answer 8 quick questions to see if the law likely protects you from this bill.

1When did you receive the care on this bill?
2What was your coverage at the time of care?
3Was it emergency care (ER visit, emergency treatment, or care right after you were stabilized)?
4Was the hospital or facility in-network, but the bill came from an out-of-network provider who treated you there (anesthesiologist, radiologist, pathologist, assistant surgeon, ER doctor, hospitalist)?
5Does this bill involve an air ambulance (medical helicopter or plane)?
6Is this bill for a ground ambulance ride?
7Before the care, did you sign a written notice-and-consent form agreeing to out-of-network treatment and waiving your billing protections?
8If you were uninsured or self-pay: did you get a Good Faith Estimate (GFE) before the care, and how does the final bill compare?

What the No Surprises Act actually protects

Since January 1, 2022, federal law (the No Surprises Act, 45 CFR Part 149) bans "balance billing" — charging insured patients more than their in-network cost sharing — in three big situations: emergency care from any provider or facility, out-of-network providers working at in-network facilities (the classic surprise anesthesiologist bill), and air ambulance transport. Uninsured and self-pay patients get a different protection: the right to a Good Faith Estimate, with a binding federal dispute process when the final bill runs $400 or more over it.

For the full picture, see our guides on balance billing and the No Surprises Act, how an in-network hospital can still bill you out-of-network, and ground ambulance rules.

Common questions

What does the No Surprises Act protect against?
For care on or after January 1, 2022, it prohibits out-of-network providers from balance billing insured patients for emergency services, for care from out-of-network providers at in-network facilities, and for air ambulance transport. You can only be charged your normal in-network cost sharing in these situations.
Does the No Surprises Act cover ground ambulances?
No — ground ambulance services are excluded from the federal law's balance-billing ban, though air ambulance is covered and a growing number of states have their own ground ambulance protections. Check your state insurance commissioner's website.
I'm uninsured — does the No Surprises Act help me?
Yes, differently. You're entitled to a Good Faith Estimate before scheduled care. If the final bill exceeds it by $400 or more, you can start the federal patient-provider dispute resolution process (45 CFR § 149.620) within 120 days for a binding decision on what you owe.
What do I do if my bill violates the Act?
Don't pay the disputed balance. Dispute it in writing citing 45 CFR § 149.110 (emergency) or § 149.120 (non-emergency at an in-network facility), and file a complaint with CMS at 1-800-985-3059 or cms.gov/medical-bill-rights. Auditing the full bill first often surfaces additional billing errors to dispute at the same time — run an audit.
This quiz is a simplified educational screening based on the federal No Surprises Act and does not account for every exception, state law, or plan-specific rule. The result is not legal advice and does not create any attorney-client or advisory relationship. Whether the Act applies to a specific bill depends on facts this tool cannot verify — consult your insurer, the CMS No Surprises Help Desk (1-800-985-3059), or a licensed attorney or patient advocate for advice about your situation.

Frequently asked questions

What should I do if my bill violates the No Surprises Act?

Do not pay the balance. Dispute the bill in writing citing 45 CFR § 149.110 (emergency) or § 149.120 (non-emergency at in-network facility), and file a complaint with CMS at 1-800-985-3059 or cms.gov/medical-bill-rights. An audit of the full bill often finds additional errors worth disputing at the same time.

Does the No Surprises Act cover ground ambulance bills?

No. Ground ambulance services are excluded from the federal No Surprises Act's balance-billing prohibitions, although air ambulance is covered and several states have their own ground ambulance protections.