How to File a No Surprises Act Complaint (and What Happens Next)

If you got an out-of-network bill you never agreed to, especially after an emergency, you may be protected by the federal No Surprises Act, and you can file a complaint about it with the government for free. Most people never do, simply because no one tells them the option exists. Here is who the law protects, how to file, and what actually happens after you hit submit.

What the No Surprises Act protects

The No Surprises Act took effect on January 1, 2022. It limits "surprise" bills in situations where you could not reasonably choose an in-network provider. The main protections:

• Emergency care. If you get emergency services from an out-of-network hospital or provider, you generally cannot be billed more than your normal in-network cost sharing.
• Out-of-network providers at an in-network facility. If you go to an in-network hospital but are treated by an out-of-network provider you did not choose (an anesthesiologist or radiologist, for example), you are usually protected unless you signed a specific consent form.
• Air ambulance. Out-of-network air ambulance services are covered by the protections.
• Uninsured and self-pay patients. You have a right to a "good faith estimate" of costs before scheduled care. If your final bill is at least $400 more than that estimate, there is a separate dispute process you can use.

One important exception to know: ground ambulance rides are generally not covered by the No Surprises Act, even though they often produce surprise bills. That gap is real, so do not assume a ground ambulance charge is automatically protected.

When filing a complaint makes sense

A complaint is appropriate when you believe a provider, facility, or health plan broke one of these rules. The most common case: you received emergency care, or care from an out-of-network provider at an in-network facility, and you were billed more than your in-network cost sharing would have been. If that matches your situation, the charge may violate the law, and a complaint puts it in front of the people who enforce it.

How to file (two free ways)

The complaint process is run by the federal government through the Centers for Medicare and Medicaid Services (CMS). As of June 2026, you have two options, both free:

• By phone: Call the No Surprises Help Desk at 1-800-985-3059. It is open 7 days a week (weekdays 8am to 8pm ET, weekends 10am to 6pm ET) and can help in hundreds of languages. They can answer questions and help you file a complaint over the phone.
• Online: Use the federal complaint form, which you can reach from the official page at cms.gov/nosurprises. (Always start from the official CMS site so you land on the real form.)

You generally have up to 120 days from receiving the bill to submit a complaint, but sooner is better, so file while everything is fresh.

What you will need

Have these ready before you start:

• The bill and your insurance Explanation of Benefits (EOB)
• The dates and a short description of the care you received
• The provider or facility name
• A clear note of why you think the charge is a surprise bill (for example: "emergency care, billed out-of-network above my in-network cost sharing")

What happens after you file

Here is the part that is hard to find written plainly:

1. Your complaint is sent to the provider, facility, or health plan. They are notified of the issue and asked to respond.
2. They usually respond, often directly to you, explaining what action was taken.
3. The agency reviews the documentation and decides what action is appropriate.
4. You are notified of the decision. A normal complaint review can take up to about 45 days, depending on the complexity.
5. If a violation is found, the matter can be referred to the appropriate federal or state enforcement authority, which can require the provider or facility to correct the charge.

If the outcome still does not resolve things, you can seek other options, including talking to your state insurance regulator, or in some cases small claims court for a disputed amount.

Do this alongside the complaint, not instead of it

A federal complaint is powerful, but it is not the only move, and it can be slow. It is worth also contacting the provider's billing department directly, in writing, to dispute the charge and ask them to reprocess it at your in-network rate. A written request creates a paper trail, can resolve things faster than the complaint process, and strengthens your position if the complaint does proceed.

That written request is where most people stall. Knowing you are protected is one thing. Saying it clearly, in language a billing office takes seriously, and pairing it with the right specific ask, is another.

A shortcut for the letter

That is what we built ClearlyFair for. You answer a few questions about your bill, and it generates a letter built around your situation, including a No Surprises Act dispute when that fits, plus a step-by-step checklist for sending it and following up. You review it, fill in your details, and send it yourself.

You can see which angles apply to your bill with a free assessment first, before paying for anything. The full letter is a one-time nineteen dollars, no account required, and your information is deleted after seven days. If you want to see exactly what you get first, here is a real example letter.

No tool, and no person, can promise an outcome. But filing the complaint and putting your dispute in writing are two of the most effective steps you can take when a surprise bill lands.

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ClearlyFair is a self-help document tool. It is not a law firm and does not provide legal, medical, or financial advice. Complaint process details reflect CMS guidance as of June 2026; confirm current steps and contact information at cms.gov/nosurprises. Results depend on your individual circumstances and are not guaranteed.