What counts as a surprise medical bill?

A surprise medical bill is an out-of-network charge you didn't choose and couldn't avoid: an out-of-network ER visit, an out-of-network anesthesiologist or radiologist at an in-network hospital, or air ambulance transport. The federal No Surprises Act bans most of these bills for insured patients.

Do I have to pay a surprise medical bill?

Not right away, and often not at all. If the bill violates the No Surprises Act, you only owe your in-network cost sharing. Don't pay until you've compared the bill against your insurance Explanation of Benefits and confirmed the charge is legal. Dispute it in writing first.

What is the No Surprises Act?

A federal law effective January 2022 that protects insured patients from most surprise out-of-network bills for emergency care and for out-of-network providers working at in-network facilities. It also gives uninsured and self-pay patients the right to a good faith estimate, with a federal dispute process if the final bill runs substantially over.

How do I report a No Surprises Act violation?

Call the federal No Surprises Help Desk at 1-800-985-3059 or file a complaint online with CMS. You can pursue the complaint and dispute the bill with the provider at the same time. Many states also have their own balance-billing complaint processes through the state insurance department.

Can I sue over a surprise medical bill?

Yes, if you paid a charge that violated the law or your insurance contract and the provider refuses to refund it, that's a money dispute you can take to small claims court without a lawyer. This applies to billing disputes only, not harm caused by the treatment itself.

What if I don't have insurance?

Uninsured and self-pay patients are entitled to a good faith estimate before scheduled care. If the final bill is at least $400 over the estimate, you can use the federal patient-provider dispute resolution process. You can also negotiate: many providers offer significant self-pay discounts when asked.

Surprise Medical Bill? Here's What to Do

An out-of-network ER bill, an anesthesiologist you never chose, a charge your insurance was supposed to cover. The federal No Surprises Act bans most surprise bills — and the ones that slip through are money disputes small claims court can handle. Don't pay until you've verified the charge.

Step 1: Don't Pay It Yet — Verify the Charge

Get an itemized bill and compare it against your insurance Explanation of Benefits. Unpaid medical bills under dispute generally can't hit your credit report for at least a year, and bills under $500 don't appear at all.

Step 2: Check Your No Surprises Act Protections

Emergency care, out-of-network providers at in-network facilities, and air ambulances are protected — you only owe in-network cost sharing. Report violations to CMS at 1-800-985-3059.

Step 3: Dispute in Writing and File Complaints

Write the billing department with documentation and a deadline. Many states add balance-billing protections enforced by the state insurance department.

Step 4: Escalate — Demand Letter, Then Small Claims Court

If the provider won't correct the bill or refund what you paid, send a formal demand letter, then sue in small claims court. No lawyer required. Note: this covers billing disputes, not medical malpractice.

Hospital refusing to budge? Read our guide on how to sue a hospital in small claims court.