No Surprises Act Explained: Your Guide to Balance Billing Protections

Complete guide to the No Surprises Act. Understand your balance billing protections, dispute process, and what hospitals must do.

You thought you were going to an in-network hospital. You had a procedure. Then the bill arrived, and it's $20,000 higher than expected—because the anesthesiologist was out-of-network. Or the lab was out-of-network. Or the radiologist was out-of-network. Welcome to surprise medical bills, the healthcare industry's most frustrating problem.

The good news: The No Surprises Act, which became effective on January 1, 2022, is designed to protect you from exactly this situation. This federal law limits balance billing, requires good faith estimates, and mandates independent dispute resolution. If you got hit with a surprise bill, this law is your shield.

In this guide, we'll explain exactly what the No Surprises Act covers, how to know if your bill violates it, and what to do if it does.

What Is the No Surprises Act?

The No Surprises Act is a federal law (part of the Consolidated Appropriations Act, 2021) that limits surprise bills in several key situations. It applies nationwide and supersedes many state laws (though some states have additional protections).

The basic principle: You shouldn't get massive bills because of situations outside your control, like:

  • An emergency
  • A provider being out-of-network without your knowledge
  • A hospital procedure involving out-of-network providers you didn't choose

What the No Surprises Act Covers

1. Emergency Services (Strongest Protection)

If you received emergency services—meaning you had a medical condition that required immediate care to prevent serious jeopardy to your health—you have the strongest protection.

What's covered:

  • ER visits
  • Urgent care centers (when presenting as an emergency)
  • Any care in response to an emergency condition

The protection:

  • Hospitals cannot charge you more than your in-network copay/deductible, even if they're out-of-network
  • The difference between what they charge and what your insurance pays must be written off
  • This applies whether or not you knew the hospital was out-of-network

Example: You had a heart attack and went to the nearest ER (an out-of-network hospital). Your in-network copay for emergency room visits is $250. Even though the hospital charges $15,000, you pay $250 and your insurance pays what it normally would. The hospital cannot bill you for the difference.

Important note: Your insurance still applies normal deductible and coinsurance. So if your plan has a $500 deductible, you might pay $500. But you won't pay the full out-of-network difference.

2. Planned Care with Out-of-Network Providers at In-Network Facilities

Sometimes you schedule a procedure at an in-network hospital, but an out-of-network specialist is involved. If you've already received an out-of-network medical bill, this section explains your rights.

What's covered:

  • Planned surgeries where a provider at an in-network hospital is out-of-network
  • Any services at an in-network facility where an involved provider is out-of-network
  • The hospital, facility, and referring provider should have disclosed this

The protection:

  • The out-of-network provider cannot balance bill you
  • You pay your in-network cost-sharing (copay, deductible, coinsurance)
  • The difference is written off

Example: You scheduled a knee surgery at your in-network orthopedic facility. Your in-network surgeon is on vacation, so they assign you to an out-of-network orthopedic surgeon instead. That surgeon cannot bill you the out-of-network difference. You pay your in-network cost-sharing, and that's it.

3. Good Faith Estimates for Planned Care

For any planned surgery or procedure where you're not paying in full upfront, hospitals and providers must give you a good faith estimate (GFE) before treatment.

What must be included:

  • Itemized list of services
  • Expected charges
  • Charges from all providers likely to be involved
  • Timeframe (usually 10 business days)

Your rights:

  • You get the estimate before treatment
  • You can dispute the estimate if you're billed significantly more
  • The hospital must cover costs above the estimate in many situations (with some exceptions)

Example: Before a planned hernia repair, the hospital gives you a good faith estimate saying the total cost will be $12,000-15,000. If the actual bill comes in at $35,000, the hospital is responsible for explaining the massive difference and potentially providing a refund.

4. Independent Dispute Resolution

If you get a surprise bill or dispute a good faith estimate, you have the right to independent dispute resolution.

How it works:

  1. You and the provider/facility submit to independent arbitration
  2. An independent reviewer (not a representative of the hospital or insurer) reviews both sides
  3. The reviewer makes a binding decision on the amount you should pay
  4. Both sides are bound by the decision

You have the right to:

  • Access dispute resolution for free
  • Request independent review within 90 days of receiving the bill
  • Have the process completed within 30 days of the request

Important: This is a significant protection because it means neither the hospital nor your insurance company can have the final word—an independent third party decides. If your insurance company has denied coverage for the service entirely, you may also need to appeal the insurance claim denial separately.

New 2026 Provider Refund Requirement

As of 2026, the No Surprises Act has an important new requirement: Providers must refund patients if they violated the act.

What this means:

  • If a provider balance-billed you in violation of the No Surprises Act, they must refund the difference
  • If you overpaid because of a No Surprises Act violation, you have a stronger claim to a refund
  • This applies retroactively, including to bills from 2022-2025

If you received a balance bill before 2026 that seems to violate the No Surprises Act, you may be entitled to a refund—even if you already paid it.

What the No Surprises Act Does NOT Cover

It's important to know what's not protected:

1. Planned Out-of-Network Care You Chose

If you deliberately chose an out-of-network provider knowing they were out-of-network, the No Surprises Act doesn't protect you. (Though you might still negotiate the bill.)

2. Services at Out-of-Network Facilities (Non-Emergency)

If you had a planned procedure at an out-of-network facility that you chose, the No Surprises Act doesn't apply. (Many state laws provide some protection here, though.)

3. Some Specific Situations

The act has exceptions for:

  • Air ambulance services
  • Some state-licensed facilities not considered hospitals
  • Ground ambulances (though some protections apply)

Check your state law – many states provide additional protections beyond federal law.

How to Know If Your Bill Violates the No Surprises Act

Ask yourself:

  1. Was this an emergency? If yes, emergency services are covered under the act.
  2. Was this planned care at an in-network facility? If yes, you should have received a good faith estimate, and out-of-network providers at that facility can't balance bill you.
  3. Did you know the provider/facility was out-of-network before treatment? If no, and it wasn't an emergency, check if the act still applies.
  4. Are you being charged more than your insurance would normally cost-share? If yes, this might violate the act.

Steps to Take If You Received a Surprise Balance Bill

Step 1: Verify Your Insurance Coverage

Call your insurance company and ask:

"I received a bill from [provider] for [service]. They're saying they're out-of-network. Can you confirm what my cost-sharing should be for this service?"

Ask them to:

  • Confirm the provider's network status
  • Calculate what you should owe based on your plan
  • Tell you if the No Surprises Act applies

Step 2: Request an Itemized Bill

Get a detailed breakdown from the provider:

"I received a balance billing notice. I'd like an itemized bill showing all services, with CPT codes, the chargemaster price, what insurance paid, and why I'm being billed the difference."

Step 3: Review Against the No Surprises Act

Check the provider's bill against the act's protections:

  • Emergency? You should pay at most your in-network cost-sharing
  • Planned care at in-network facility? You should pay your in-network cost-sharing
  • Different from GFE? You might not owe the overage

Step 4: Request a Refund with No Surprises Act Reference

Send a written request (email or letter) to the provider:

"I received a bill from [date] for [service]. Under the No Surprises Act, this bill appears to violate balance billing protections because [reason: emergency/in-network facility/exceeded GFE]. I request a refund of the amount exceeding my normal cost-sharing, which is $[amount]. Please respond within 10 business days."

Step 5: File an Independent Dispute Resolution Request

If the provider refuses, request independent dispute resolution:

"I'm requesting independent dispute resolution under the No Surprises Act for the bill dated [date]. I've submitted documentation that the charge violates balance billing protections. Please provide information on how to submit my case."

The provider is required to give you dispute resolution information if you ask.

Step 6: File a Complaint

If you can't resolve it, file complaints with:

  • CMS (Centers for Medicare & Medicaid Services): cms.gov/nosurprises – they enforce the federal act
  • Your State Insurance Commissioner: regulates insurance and healthcare billing
  • Your State Attorney General: may investigate healthcare fraud or violations

How the No Surprises Act Interacts with Medicare and Medicaid

For Medicare Beneficiaries

The No Surprises Act largely mirrors Medicare rules that were already in place. Key points:

  • Emergency services have the same protections
  • Out-of-network providers at in-network facilities can't balance bill
  • Good faith estimates apply to Medicare Advantage plans
  • Some additional state law protections may apply

For Medicaid Beneficiaries

Medicaid has long prohibited balance billing. The No Surprises Act:

  • Reinforces existing Medicaid protections
  • Adds the good faith estimate requirement
  • Ensures independent dispute resolution

State Medicaid programs may have additional rules.

State-Level Protections Beyond the No Surprises Act

Many states have additional balance billing protections that go beyond federal law. Some states:

  • Prohibit balance billing for out-of-network care even if you chose the facility
  • Require good faith estimates for more services
  • Have stricter dispute resolution timelines
  • Provide additional remedies for violations

Check your state's insurance commissioner website to see what additional protections apply in your state.

Real-World No Surprises Act Examples

Example 1: Emergency Room Bill (Covered)

Scenario: You had chest pain and went to the nearest ER (out-of-network). The bill is $18,000. Your in-network ER copay is $250.

What you owe: $250 (your in-network copay)

Why: Emergency services are protected. The hospital cannot balance bill for the out-of-network difference.

What happens: Insurance pays its normal amount. Hospital writes off the difference. You pay your copay and that's it.

Example 2: Planned Surgery with Out-of-Network Anesthesiologist (Covered)

Scenario: You have knee surgery scheduled at your in-network orthopedic center. The anesthesiologist who shows up is out-of-network and bills you $3,000 more than in-network would cost.

What you owe: Your normal in-network cost-sharing only

Why: Planned care at an in-network facility with an out-of-network provider triggered disclosure requirements, and the provider cannot balance bill.

What happens: You pay your deductible and coinsurance as normal. The anesthesiologist's balance bill is written off.

Example 3: Emergency Care Where GFE Was Exceeded (Covered)

Scenario: You had emergency gallbladder surgery. Before admission, you received a good faith estimate of $22,000-25,000. The actual bill is $47,000.

What you owe: Your normal cost-sharing on the estimated amount (around $22,000-25,000, not $47,000)

Why: The bill massively exceeds the good faith estimate, and the provider can't bill the overage.

What happens: You dispute the bill. Independent resolution decides if the overage is legitimate. If not, the provider must refund it.

Example 4: Out-of-Network Facility You Chose (NOT Covered)

Scenario: You chose an out-of-network hospital for elective surgery. You knew it was out-of-network. The bill is $35,000 and your insurance paid $10,000. The hospital is billing you the $25,000 difference.

What the No Surprises Act says: Not covered—you chose the out-of-network facility knowingly.

What you can do: Negotiate the bill, dispute errors, check for overcharges. You're not protected by the No Surprises Act, but other protections may apply.

How to Know if You Have a Legitimate No Surprises Act Claim

You likely have a claim if:

  • This was emergency care, OR
  • This was planned care at an in-network facility, OR
  • You weren't notified in advance that the provider was out-of-network, OR
  • You were given a good faith estimate that you're now being charged significantly more than

You likely don't have a claim if:

  • You chose an out-of-network facility in advance
  • You signed acknowledgment that you were choosing out-of-network care
  • This is air ambulance or other non-hospital service

The Bottom Line

The No Surprises Act is one of the strongest patient protections in healthcare. If you received a surprise balance bill, there's a good chance it violates the law and you're entitled to a refund.

Key takeaways:

  • Emergency care has the strongest protection
  • Planned care at in-network facilities should never result in surprise bills
  • Good faith estimates must be honored
  • You have the right to independent dispute resolution
  • Violations should result in refunds as of 2026

If you believe you were balance billed in violation of the act, take action. Don't just pay it.

Get Your Bill Analyzed for No Surprises Act Violations

Determining whether a bill violates the No Surprises Act requires understanding the law and analyzing your specific situation. That's complex.

Fix My Bill automatically checks your bill for No Surprises Act violations:

  • Emergency service verification – confirms if emergency protections apply
  • In-network facility check – determines if your procedure qualifies for protections
  • Good faith estimate comparison – flags bills that far exceed estimates
  • Violation identification – highlights specific legal violations
  • Dispute process guidance – shows you exactly how to proceed

Upload your bill and get an instant analysis showing whether it violates the No Surprises Act—and what to do about it.

Check your bill for violations now – it takes less than 2 minutes.