The federal No Surprises Act protects you from balance billing when you receive emergency care, regardless of whether the provider works in your insurance network. Under the law effective January 1, 2022, you pay only your plan's in-network cost-sharing—your copay, coinsurance, or deductible—and the provider cannot bill you for any additional amount. This protection covers not just the emergency room physician, but also the diagnostic imaging, lab work, anesthesia, and other services needed to determine whether an emergency exists. The law applies to all private insurance plans and to patients covered by employer plans, but has important exceptions for certain government programs and services like ground ambulance transport.
Table of Contents
- What "Emergency Services" Means Under Federal Law
- Your Network Cost-Sharing Is Your Only Bill
- What Is NOT Protected by Federal Law
- How to Dispute a Surprise Emergency Bill
- Your State May Offer Additional Protections
- Frequently Asked Questions
What "Emergency Services" Means Under Federal Law
An emergency service includes any evaluation and treatment you receive in an emergency room, urgent care facility, or hospital setting when you have a medical condition requiring immediate evaluation and care. The No Surprises Act protects all diagnostic imaging, pathology, and anesthesia services needed to evaluate whether an emergency exists, according to the Centers for Medicare & Medicaid Services.
This means you're protected even if a hospital brings in a specialist, radiologist, or anesthesiologist you didn't choose and who is out-of-network. Even if the emergency visit results in no diagnosis or admission—if the ER determines your condition is not life-threatening—the cost-sharing limit still applies to what you pay that day.
Your Network Cost-Sharing Is Your Only Bill
Under the No surprises Act, you owe only what you would owe if the provider were in your insurance network. If your plan's in-network ER copay is $150, that is your total responsibility, regardless of whether the hospital, radiologist, or surgeon is in-network or not.
Health plans cannot deny emergency coverage or charge out-of-network rates for lack of prior authorization, according to the U.S. Department of Labor. This means the provider cannot demand pre-approval as a condition of emergency care coverage, and your insurance company cannot use the absence of prior authorization to pay less or shift the balance to you.
What Is NOT Protected by Federal Law
Ground ambulance transport does not receive the same federal protection. Ground ambulances are not covered by federal surprise billing law, and patients can receive out-of-network bills, though 22 states now prohibit ground ambulance surprise billing, including Washington, Illinois, New Hampshire, Texas, and Oregon.
Additionally, Medicare, Medicaid, Veterans Affairs, TRICARE, and standalone dental or vision plans operate under separate surprise billing rules and are exempt from the No Surprises Act. If you are covered by one of these programs, your protections and dispute procedures may differ. Contact your plan directly to understand your specific rights.
How to Dispute a Surprise Emergency Bill
If you receive a bill that appears to violate your surprise billing rights, you have two main remedies. You can file an Independent Dispute Resolution (IDR) request with the federal government, which has become more affordable: administrative fees dropped 85% to $15 per party effective August 3, 2026, and a centralized IDR Gateway platform launched September 15, 2026.
You can also file a complaint with your state insurance commissioner. You have the right to receive a one-page notice explaining balance billing rights, dispute procedures, and how to reach the HHS No Surprises Help Desk at 1-800-985-3059. This notice should be provided at the facility. If you did not receive one, request it or file a complaint with your state regulator.
Your State May Offer Additional Protections
State surprise billing laws vary widely: 18 states have comprehensive protections, 15 have partial coverage, and 17 have none, with New York and California among the strongest. Your state may extend federal protections to additional services, providers, or situations. If your insurance company or provider claims your emergency bill does not qualify for federal protections, confirm the reasoning with your state insurance commissioner—it may not be correct.
Some states that lack comprehensive surprise billing protections nevertheless require ground ambulance providers to bill in-network or offer transparent pricing upfront. Check your state's insurance department website for your specific protections, or call the HHS No Surprises Help Desk for guidance.
Frequently Asked Questions
If I get emergency care out-of-state, do federal surprise billing protections apply?
Yes. The No Surprises Act applies nationwide to all private insurance plans. The law does not change based on location.
My insurance company says the bill is correct because I didn't get pre-approval. Can they do that?
No. Health plans cannot charge out-of-network rates or deny emergency coverage because you lacked prior authorization. If your plan is claiming this, file a complaint with your state insurance commissioner.
Does this protection apply to the ambulance that brought me to the hospital?
Federal law does not protect ground ambulances. However, 22 states prohibit ground ambulance surprise billing. Check with your state insurance commissioner to learn whether your state is one of them.
How long do I have to dispute a surprise emergency bill?
There is no federal deadline stated in the core protections; however, most disputes are typically filed within 30 days to 1 year. Contact the HHS No Surprises Help Desk at 1-800-985-3059 or your state insurance commissioner for the specific timeline in your situation.