What Is the No Surprises Act? How It Protects You from Unexpected Medical Bills

Imagine waking up from surgery—only to discover six months later that an assistant surgeon you never met sent you a bill for thousands of dollars. Before 2022, this scenario was not just common; it was perfectly legal.

A 2020 study by the Peterson-KFF Health System Tracker estimated that 1 in 5 emergency claims and 1 in 6 in-network hospitalizations included at least one surprise bill for out-of-network services, with 13% of those bills exceeding $2,000 in out-of-pocket costs . That is exactly why Congress passed the No Surprises Act—a landmark piece of patient protection legislation designed to end the practice of balance billing and restore transparency to American health care.

What Is the No Surprises Act?

The No Surprises Act is a federal law signed by President Trump in 2020 and enacted on January 1, 2022, that protects patients with private health insurance from receiving unexpected out-of-network medical bills . If you have employer-sponsored coverage or a plan purchased through the individual market, this law fundamentally changes how much you can be charged when you unknowingly or unavoidably receive care from a provider outside your insurance network.

At its core, the law bans balance billing—the practice where an out-of-network provider bills you for the difference between their full charge and what your insurance plan agrees to pay . Under the No Surprises Act, if you are protected, your cost-sharing is limited to what you would pay for in-network care. The provider and insurer must then negotiate the remaining payment or use an independent dispute resolution process, but you are removed from the middle of that fight .

What Is Surprise Billing?

Surprise billing happens when you receive care from an out-of-network provider or facility without knowingly choosing to do so—and your health plan does not cover the full cost. In the past, you could be billed for the "balance" between the provider's charge and your insurer's allowed amount, on top of your regular deductible, copay, or coinsurance .

Consider these all-too-common scenarios:

• The hidden specialist: You schedule knee surgery at an in-network hospital. Your orthopedic surgeon is in-network, but the anesthesiologist is not. Months later, a bill arrives for hundreds—or thousands—of dollars.
• The emergency room gamble: You rush to the nearest emergency department after chest pain. The hospital is in-network, but the attending emergency physician is not. Before the No Surprises Act, you could have been balance billed for that physician's services.
• The air ambulance ride: After a serious accident, you are transported by air ambulance to a trauma center. Air ambulance services were historically a major source of surprise bills, with patients often receiving five-figure bills for lifesaving transport .

Who Is Protected?

The No Surprises Act applies to most private health insurance plans, including those you receive through your employer and those purchased individually . However, it does not apply to everyone. The law does not cover:

• Medicare and Medicare Advantage beneficiaries
• Medicaid enrollees
• TRICARE and VA health care recipients
• Indian Health Service beneficiaries
• Short-term, limited-duration insurance plans
• Excepted benefits plans (standalone dental or vision coverage)
• Retiree-only plans

If you fall into one of the excluded categories, you may already have existing protections under your specific program, or you may need to rely on state-level balance billing laws.

What the Law Covers—and What It Doesn't

Understanding the scope of the No Surprises Act is essential to using it effectively. The law provides robust protections in three main areas:

1. Most emergency services: This includes care received in a hospital emergency department, a freestanding emergency department, and pre- and post-stabilization services. Importantly, your plan cannot deny coverage simply because you did not obtain prior authorization before seeking emergency care .
2. Non-emergency ancillary services at in-network facilities: If you are at an in-network hospital or ambulatory surgical center, you are protected from out-of-network charges for ancillary services such as anesthesiology, pathology, radiology, and neonatology. These providers cannot ask you to waive your protections .
3. Out-of-network air ambulance services: The law bans balance billing for air ambulance transport, a historically high-cost surprise .

However, the No Surprises Act does not cover everything. You can still receive unexpected bills for:

• Ground ambulance services (even in emergencies)
• Out-of-network urgent care centers
• Birthing centers and nursing homes
• Non-emergency services at out-of-network facilities
• Services your plan simply does not cover
• Your normal in-network cost-sharing (deductibles, copays, and coinsurance still apply)

Your Rights: Emergency Care vs. Non-Emergency Care

The No Surprises Act treats emergency and non-emergency care differently, and knowing the distinction can save you money and stress.

Emergency Care: If you have a medical emergency, you are protected from balance billing regardless of whether the hospital or provider is in your network. The protections apply from the moment you arrive until your condition is stabilized. Even if your final diagnosis turns out to be non-life-threatening—say, severe abdominal pain that is ultimately diagnosed as indigestion—your plan cannot retroactively deny coverage because the diagnosis was not an emergency .

Non-Emergency Care: For scheduled procedures at in-network hospitals or ambulatory surgical centers, the law protects you from out-of-network charges for ancillary providers you did not choose. However, there is an important exception called "notice and consent."

The Notice and Consent Exception

In certain non-emergency situations, a provider or facility can ask you to voluntarily waive your No Surprises Act protections. This is only allowed when:

• You schedule certain non-emergency services at an in-network facility, and
• The provider is not an ancillary specialist (like an anesthesiologist or radiologist), and
• You receive the notice at least 72 hours before the service

If you sign the consent form, you agree to pay out-of-network rates. This is why it is critical to read every document before a scheduled procedure. You are never required to waive your protections for emergency services or for ancillary services at in-network facilities .

Good Faith Estimates for Uninsured and Self-Pay Patients

The No Surprises Act is not just for the insured. If you do not have health insurance or choose not to use it, health care providers must give you a good faith estimate of expected charges before scheduled non-emergency services .

For services scheduled at least three business days in advance, you should receive the estimate within one business day of scheduling. This estimate must include the primary service, any reasonably expected additional services, diagnosis codes, and expected charges .

If your final bill is at least $400 higher than the good faith estimate, you have the right to initiate a federal patient-provider dispute resolution process within 120 days of receiving the bill .

How Do I File a Medical Bill Complaint?

If you believe you have received a bill that violates the No Surprises Act, you are not powerless. Here is a practical, step-by-step guide to filing a complaint through the official government portal.

Step 1: Review Your Paperwork

Before taking action, compare your medical bill with your Explanation of Benefits (EOB). Your EOB—sent by your health plan—breaks down what services you received, what your plan will pay, and what you legitimately owe . If the bill exceeds what your EOB shows you owe in cost-sharing, that is a red flag.

Step 2: Gather Supporting Documentation

Collect all relevant documents, including:

• The medical bill in question
• Your insurance card (take a photo)
• Your Explanation of Benefits
• Any good faith estimate you received
• Signed notice and consent forms (if applicable)
• Correspondence with your provider or insurer
• Your plan's summary of benefits

Step 3: Contact the No Surprises Help Desk

The federal government operates the No Surprises Help Desk to assist patients. You can call 1-800-985-3059 Monday through Friday, 8 a.m. to 8 p.m. ET, and Saturday through Sunday, 10 a.m. to 6 p.m. ET . Representatives can answer questions, review your situation, and guide you through the complaint process. Assistance is available in English, Spanish, and over 350 other languages .

Step 4: Submit an Online Complaint

To file a formal complaint, visit the official CMS portal at cms.gov/medical-bill-rights/help/submit-a-complaint . The online Consumer Complaint Form will ask for:

• Your contact information
• Details about the provider, facility, and insurer involved
• A detailed description of the billing issue
• Uploads of your supporting documentation

You do not need every document to file, but the more information you provide, the faster CMS can review your case .

Step 5: Understand What Happens Next

After submission, you will receive a confirmation number and an email from noreply_nosurpriseshelpdesk@cms.hhs.gov . CMS will review your complaint to determine whether the provider, facility, or insurer followed federal surprise billing rules. If additional information is needed, they will contact you within 60 days .

The Help Desk can investigate compliance and refer your complaint to the appropriate federal or state enforcement authority. However, it cannot force a provider to adjust charges, provide legal advice, or make medical judgments .

Step 6: Explore Additional Appeals

If your health plan denied coverage in violation of the No Surprises Act, you also have the right to file an internal appeal directly with your insurer. Request a copy of your plan's appeals procedure and submit your appeal in writing. Your plan must respond promptly .

Is the No Surprises Act Working?

Early evidence suggests the law is achieving its intended effect. A February 2026 Government Accountability Office (GAO) report found that the No Surprises Act is successfully pushing the health care market toward more in-network care and fewer surprise bills . After years of declining in-network participation, specialties historically associated with surprise billing—including emergency medicine, radiology, anesthesiology, and air ambulance—have seen increased in-network contracting since the law took effect .

Higher in-network participation means stronger relationships between insurers and providers, more predictable reimbursement, and fewer billing disputes that leave patients caught in the crossfire. However, the GAO noted that full implementation of remaining provisions—such as advanced explanations of benefits and improved transparency around qualified payment amounts—could further strengthen patient protections .

Key Takeaways

• The No Surprises Act took effect on January 1, 2022, and protects privately insured patients from most surprise out-of-network bills.
• Balance billing is banned for emergency services, ancillary services at in-network facilities, and air ambulance transport.
• The law does not cover ground ambulances, urgent care centers, birthing centers, nursing homes, or Medicare/Medicaid beneficiaries.
• In non-emergency situations, providers may ask you to sign a "notice and consent" form to waive your protections—but this is never allowed for emergency or ancillary services.
• Uninsured and self-pay patients have the right to a good faith estimate before scheduled care and can dispute bills that exceed the estimate by $400 or more.
• If you receive a questionable bill, always compare it to your Explanation of Benefits (EOB) first.
• You can file a complaint by calling the No Surprises Help Desk at 1-800-985-3059 or submitting a complaint online at cms.gov/medical-bill-rights/help/submit-a-complaint.
• Gather all documentation—bills, EOBs, insurance cards, and correspondence—before filing your complaint.
• The Help Desk can review your case and refer it to enforcement authorities, but it cannot provide legal advice or force a provider to change their charges.
• A 2026 GAO report confirms the law is increasing in-network care and reducing surprise bills nationwide.

Call-to-Action: Medical billing is complicated, but your rights don't have to be a mystery. Share this article with friends and family to help them understand their protections under the No Surprises Act. Knowledge is the first step toward financial peace of mind in a health crisis.