What Is the Surprise Billing Dispute Resolution Process?

Surprise billing—receiving an unexpected bill from an out-of-network provider you did not choose or know was out of network—was one of the most complained-about problems in American healthcare before 2022. The No Surprises Act, effective January 1, 2022, created federal protections and a dispute resolution process to address these bills. Understanding how the system works can save you from paying thousands of dollars you do not legally owe.

What Is Surprise Billing?

Surprise billing occurs when you receive care from an out-of-network provider in a situation where you either had no meaningful choice or had no notice that the provider was out of network. Classic scenarios include:

• You go to an in-network emergency room, but the ER physician group is out of network
• You schedule a procedure at an in-network hospital and an out-of-network anesthesiologist is assigned to your case
• You are transported by an air ambulance service that is not in your network
• An out-of-network assistant surgeon participates in your in-network surgery without your knowledge

Before 2022, patients in these situations often faced bills for the full difference between what the provider charged and what the insurer paid—sometimes tens of thousands of dollars.

What the No Surprises Act Prohibits

For group health plans and individual plans, the No Surprises Act prohibits:

• Surprise billing for emergency services. Providers cannot bill you more than your in-network cost-sharing for emergency services, regardless of network status.
• Surprise billing for non-emergency services at in-network facilities when you did not have a meaningful choice of provider. This includes the radiologist, anesthesiologist, pathologist, neonatologist, or assistant surgeon who participates in your care.
• Air ambulance surprise billing. Air ambulance services cannot bill you more than in-network cost-sharing under most circumstances.

The law requires providers and insurers to resolve their payment disputes among themselves—not on your back.

The Federal Independent Dispute Resolution (IDR) Process

When a provider and insurer cannot agree on payment for a No Surprises Act-protected service, either party can initiate the federal IDR process. Patients do not initiate IDR—it is between providers and insurers. However, understanding it matters because the outcome determines your final bill.

Step 1: Open negotiation (30 days). After the insurer's initial payment, the provider and insurer have 30 business days to negotiate directly.

Step 2: IDR initiation. If negotiation fails, either party can initiate the federal IDR process through the CMS portal within 4 business days after the negotiation period ends.

Step 3: IDR entity selection. Both parties select a certified IDR entity (a neutral arbitration body approved by the federal government) within 3 business days. If they cannot agree, CMS assigns one.

Step 4: Offers and decision. Each side submits their proposed payment amount. The IDR entity must choose one of the two offers—it cannot split the difference. The decision must be made within 30 business days. The IDR entity is guided by the Qualifying Payment Amount (QPA)—essentially the median in-network rate for the service—and can consider additional factors like provider training, market share, and complexity of the service.

Step 5: Payment. The losing party pays the IDR entity's fee (currently $350 to $700 per dispute). The insurer pays the provider the winning amount, and the patient pays only their in-network cost-sharing.

What Patients Can Do Directly

While patients do not file IDR claims, you have direct remedies:

Contact the No Surprises Help Desk. If you received a surprise bill in violation of the No Surprises Act, call 1-800-985-3059. You can file a complaint and receive assistance navigating the protections.

Submit a complaint to CMS. CMS accepts complaints about No Surprises Act violations at cms.gov/nosurprises.

Dispute the bill with your insurer. If your insurer is not properly applying No Surprises Act protections to your claim, file an appeal citing the specific protections.

Refuse to sign consent forms under duress. Providers can ask you to consent to out-of-network charges for non-emergency elective services—but they must give you written notice at least 72 hours before the service (or 3 hours for same-day scheduling) and must list alternatives. If you did not receive proper notice and consent, you do not owe the surprise bill.

Air Ambulance Bills

Air ambulance is specifically included in No Surprises Act protections. If you receive an air ambulance bill beyond your in-network cost-sharing, dispute it. Air ambulance companies have pushed back hard against these rules and may still send improper bills—do not assume the bill is valid.

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Related Reading:

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal