Quick Answer: The No Surprises Act (effective January 1, 2022) bans out-of-network balance billing for emergency room visits. If you have private insurance, you can only be charged your normal in-network cost-sharing amount, regardless of which ER or providers treated you. If you received a higher bill, you have the right to dispute it.
Emergency room visits are stressful enough without receiving a bill weeks later for thousands of dollars from an out-of-network anesthesiologist, radiologist, or emergency physician you never chose. That was the norm before 2022. The No Surprises Act changed it.
As of 2026, federal law prohibits most surprise billing for emergency care. But the law only protects you if you know your rights and act on them. Many patients still pay bills they legally do not owe, simply because they do not know to push back. This guide explains exactly what the law covers, what it does not, and the step-by-step process for disputing an ER bill that violates it.
Before diving into the dispute process, know that the CoveredUSA Bill Analyzer can help you identify which charges on your ER bill are above standard rates and which line items look like potential billing errors, giving you specific numbers to cite when you call the hospital or your insurer.
What the No Surprises Act Actually Covers
The No Surprises Act is a federal law that took effect January 1, 2022 as part of the Consolidated Appropriations Act of 2021. It applies to most private health insurance plans, including employer-sponsored coverage and plans purchased through the ACA marketplace.
Emergency Services
For emergency room visits, the law is broad and automatic. Your insurer cannot charge you more than your in-network cost-sharing amount for:
- Emergency department facility fees
- Emergency physician services
- Radiologists, anesthesiologists, and other specialists who treat you in the ER, regardless of whether they are in-network
This protection applies even if you go to an out-of-network hospital, and even if you had no way to choose who treated you. The insurer and provider work out the payment difference between themselves. You pay only your normal in-network deductible, copay, or coinsurance.
Non-Emergency Services at In-Network Facilities
The law also covers non-emergency services provided by out-of-network providers at an in-network facility. If you go to a hospital your insurance covers and a specialist brought in for your care is out-of-network, you cannot be balance billed for that service unless you signed a valid consent form in advance.
Air Ambulance Services
Air ambulance services from out-of-network providers are also covered. Ground ambulance is NOT currently covered by the No Surprises Act, though some states have their own protections.
What Is NOT Covered
- Ground ambulance services (federal law does not cover these yet)
- Elective out-of-network care where you signed a valid consent form and received notice
- Services from providers you specifically chose to go out-of-network
- Medicare and Medicaid enrollees (these programs have separate protections)
Your Cost-Sharing Rights at the ER: At a Glance
| Situation | What You Owe |
|---|
| Insured, go to out-of-network ER (emergency) | In-network cost-sharing only |
| Insured, out-of-network specialist treats you at in-network hospital | In-network cost-sharing only (no consent form) |
| Insured, out-of-network air ambulance | In-network cost-sharing only |
| Insured, out-of-network non-emergency where you signed consent | Balance billing allowed |
| Uninsured / self-pay | Good faith estimate required before care |
| Medicare or Medicaid | Separate rules apply |
Step-by-Step: How to Dispute an ER Bill Under the No Surprises Act
If you received a bill that looks like a balance bill or out-of-network charge for ER services, here is exactly what to do.
Step 1: Identify the Violation
Pull out your Explanation of Benefits (EOB) from your insurer and the bill from the provider. Look for:
- Any charge coded as out-of-network for ER services
- A balance due that exceeds your in-network deductible, copay, or coinsurance
- Line items from specialist providers you did not specifically choose (radiologist, anesthesiologist, etc.)
Run the charges through the CoveredUSA Bill Analyzer to compare what you were billed against standard rates. This gives you a clear picture of which charges are above the expected amount before you start making phone calls.
Step 2: Call Your Insurer First
Your health plan is responsible for limiting your cost-sharing. Call the member services number on the back of your insurance card and:
- Reference the No Surprises Act by name
- State the date and location of your ER visit
- Explain that you are being billed out-of-network cost-sharing for emergency services
- Ask them to reprocess the claim as in-network
Keep notes of who you spoke with, the date, and what they said. Request a reference number for the call.
Step 3: Contact the Provider or Hospital
If your insurer confirms the claim was processed correctly but you are still getting a bill from the provider, contact the provider's billing department. Tell them:
- The No Surprises Act prohibits balance billing for emergency services
- You are only required to pay your in-network cost-sharing as determined by your insurer
- You are disputing any amount above that
Ask for the bill to be corrected or for a written explanation of why they believe the charge is allowed.
Step 4: File a Complaint with CMS
If the insurer or provider does not resolve the issue, file a complaint with the federal government. The No Surprises Help Desk handles these complaints:
CMS investigates complaints and can refer cases to the appropriate enforcement authority. Provide your EOB, the disputed bill, and a record of your prior contacts with the insurer and provider.
Step 5: Request External Review
If your insurer denied coverage and you believe it was wrong, you can also appeal through the external review process. For urgent claims, external review must begin within 72 hours. For standard claims, you generally have up to 4 months after the denial to file for external review.
If You Are Uninsured: Good Faith Estimates
Uninsured and self-pay patients have a separate but related protection under the No Surprises Act. Healthcare providers must give you a Good Faith Estimate (GFE) of expected charges before scheduled services.
If your final bill is $400 or more above the GFE total, you can dispute it through the federal Patient-Provider Dispute Resolution (PPDR) process:
- You must file within 120 days of receiving the bill
- Contact CMS at 1-800-985-3059 to start the process
- A third-party reviewer determines a fair payment amount
This process specifically protects people who are paying out of pocket, not going through insurance.
When Providers Can Still Balance Bill You
The No Surprises Act includes an exception. Providers can ask you to waive your balance billing protections if:
- They give you written notice that they are out-of-network
- They give you a good faith estimate of the extra costs
- You sign a consent form at least 72 hours before the appointment (or same day if scheduled less than 72 hours in advance)
This waiver option is NOT available for emergency services. You cannot legally be asked to sign away your ER balance billing protections in an emergency situation. If a hospital tried to get you to sign such a form in the ER, that waiver is almost certainly invalid.
The Independent Dispute Resolution (IDR) Process
The IDR process is the mechanism insurers and providers use to settle payment disputes with each other. As a patient, you are generally not a party to IDR. Your job is to enforce your cost-sharing cap. Here is a quick overview of how it works behind the scenes:
- Open negotiation (30 business days): The insurer and provider try to agree on a payment amount after the insurer pays an initial amount.
- IDR filing: If they cannot agree, either party can file for IDR within 4 business days of the negotiation period ending.
- Arbitration: A certified IDR entity reviews both parties' offers and selects one. Payment must be made within 30 calendar days of the decision.
The IDR system has come under strain as of 2026. Providers filed over 1 million disputes between 2022 and 2024, and the backlog has been significant. But none of this affects your individual cost-sharing cap as a patient. You pay your in-network amount. Period.
No Surprises Act Protections: A Comparison Table
| Protection | Insured Patients | Uninsured/Self-Pay Patients |
|---|
| ER balance billing ban | Yes | N/A (no insurer involved) |
| Out-of-network cost-sharing cap | Yes (in-network amount only) | No |
| Good faith estimate required | No (but can ask) | Yes, for scheduled services |
| Dispute mechanism | Insurance complaint, CMS complaint, external review | Patient-Provider Dispute Resolution (PPDR) |
| Complaint hotline | 1-800-985-3059 | 1-800-985-3059 |
| Deadline to file PPDR | N/A | 120 days from bill |
Frequently Asked Questions
What is the No Surprises Act and when did it take effect?
The No Surprises Act is a federal law that took effect January 1, 2022. It bans surprise medical billing for most emergency services and certain non-emergency services when an out-of-network provider treats you at an in-network facility. It applies to most private health plans, including ACA marketplace plans and employer-sponsored coverage.
Can an out-of-network ER doctor bill me more than my in-network copay?
No. Under the No Surprises Act, you can only be charged your in-network cost-sharing amount for emergency services, even if the treating physician, radiologist, or anesthesiologist is out-of-network. Any amount above your in-network cost-sharing is prohibited under federal law.
What do I do if I already paid a surprise bill before knowing about this law?
You may still have options. Contact your insurer and the provider to request a refund for amounts you paid beyond your in-network cost-sharing. File a complaint with CMS at 1-800-985-3059. There is no guarantee of recovery for amounts already paid, but many patients do receive adjustments when they push back formally.
Does the No Surprises Act apply to Medicare or Medicaid?
No. Medicare and Medicaid have their own billing protections. The No Surprises Act specifically covers most private health insurance plans. If you are enrolled in Medicare or Medicaid and received a surprise bill, contact your program directly.
What is a Good Faith Estimate and who can get one?
A Good Faith Estimate is a written cost breakdown providers must give uninsured and self-pay patients before scheduled services. It must include expected charges from all providers involved in your care. If your actual bill is $400 or more above the GFE, you can dispute it through the federal Patient-Provider Dispute Resolution process within 120 days.
What if my insurer denies coverage and says the service was not an emergency?
Insurers must use the "prudent layperson" standard to decide if something qualifies as an emergency. This means the situation only needs to reasonably look like an emergency to a non-medical person, not necessarily result in a serious diagnosis. If your insurer denies coverage on these grounds, file an internal appeal and then an external review. The external review is free and must be resolved quickly for urgent cases.
Can I be billed for an out-of-network anesthesiologist if I had planned surgery at an in-network hospital?
Generally no, unless you signed a valid consent form in advance agreeing to pay out-of-network rates for that specific provider. The consent form must have been provided at least 72 hours before your scheduled procedure and include a cost estimate. If you did not sign such a form, the No Surprises Act protections apply.
How do I identify errors or overcharges on my ER bill specifically?
Upload your hospital bill to the free CoveredUSA Bill Analyzer to find errors, overcharges, and charity care options in 30 seconds. The analyzer compares each line item against standard rates so you know exactly which charges to challenge before contacting your insurer or the hospital billing department.
What Stays the Same: Your Responsibilities
The No Surprises Act does not eliminate your cost-sharing obligations. You still owe your deductible, copay, and coinsurance at the in-network rate. The law only prevents providers and insurers from charging you more than those in-network amounts for covered emergency situations.
It also does not protect you from high in-network costs. If your deductible is $5,000, you still owe the first $5,000 of covered ER costs. The law ensures the total calculation is correct, not that your plan's cost-sharing is affordable.
If you are struggling with a large ER bill even after confirming it was calculated correctly, ask the hospital about financial assistance programs or payment plans. Most nonprofit hospitals are required to offer charity care for patients below certain income thresholds.
The No Surprises Act gives patients real leverage that did not exist before 2022. But that leverage only works if you know it is there and you use it. If your ER bill looks wrong, it may well be. Upload your bill to the CoveredUSA Bill Analyzer, document what you find, and follow the dispute steps above.
