Surprise Medical Bill: What to Do Next

A surprise medical bill — sometimes called a balance bill — is a charge you did not expect and could not reasonably have anticipated. The most common scenarios include:

• —Out-of-network providers at in-network facilities — you go to an in-network hospital, but the anesthesiologist, radiologist, pathologist, or ER physician assigned to your case is out-of-network and bills you separately at higher rates
• —Emergency care at out-of-network hospitals — you are taken to the nearest ER during an emergency and later discover the hospital is not in your insurance network
• —Services you were not told about in advance — additional tests, consultations, or procedures performed without your prior knowledge or consent
• —Bills arriving weeks or months later — charges from providers you did not realize were involved in your care, sometimes appearing months after the service date

Not every high bill is a surprise bill in the legal sense. If you knowingly chose an out-of-network provider and were informed of the cost implications, the No Surprises Act protections may not apply — but you can still dispute the charges if they are unreasonable.

The No Surprises Act, effective since January 2022 ², is the most important tool in your arsenal against surprise medical bills. The law protects insured patients in three key scenarios:

• —Emergency services: All emergency care must be billed at in-network rates, regardless of the facility or provider's network status. You owe only your in-network copay, coinsurance, or deductible.
• —Out-of-network providers at in-network facilities: If you receive care from an out-of-network provider at an in-network hospital or surgical center, you cannot be billed more than in-network cost-sharing amounts.
• —Out-of-network air ambulance services: Air ambulance providers cannot balance bill you beyond in-network cost-sharing.

In all covered scenarios, the provider and your insurer must resolve the payment dispute between themselves. You are not responsible for any amount beyond your in-network cost-sharing. If you receive a bill that appears to violate these protections, you have every right to challenge it.

Follow these steps in order when an unexpected medical bill arrives:

• —Do not pay immediately — you have time to review and dispute. Paying may waive some of your rights.
• —Request an itemized bill — get the full breakdown with procedure codes, provider names, and amounts for every charge
• —Check your Explanation of Benefits (EOB) — your insurer's EOB will show what they paid, what they denied, and why. Compare it against the bill.
• —Determine if the No Surprises Act applies — was this emergency care? An out-of-network provider at an in-network facility? If yes, you are protected.
• —Contact your insurer — if the Act applies, ask them to reprocess the claim at in-network rates
• —Contact the provider — inform them that the charge is subject to surprise billing protections and should be adjusted
• —Upload the bill to ORVO — compare the charges against market rates to determine if they are fair, regardless of network status
• —File a complaint if needed — if the provider or insurer does not comply, file a complaint with CMS at 1-800-985-3059

Emergency room visits are the most common source of surprise medical bills, and they receive the strongest federal protections. Under the No Surprises Act ², if you receive emergency care — whether at an in-network or out-of-network facility — you are protected from balance billing for the entire emergency visit. This includes:

• —All facility fees for the ER visit
• —All physician charges from ER doctors, regardless of their network status
• —All ancillary services — labs, imaging, medications, and supplies provided during the emergency
• —Post-stabilization care unless you are given notice and consent to out-of-network billing after your condition is stabilized

The key concept is stabilization. All care from arrival through stabilization is protected. If the hospital wants to continue treating you at out-of-network rates after stabilization, they must provide written notice and obtain your informed consent. Without that notice and consent, the in-network billing protection continues.

If you believe your bill violates the No Surprises Act or is otherwise unfair, dispute it formally:

• —For insured patients: Contact your insurer first and ask them to enforce the No Surprises Act protections. If the insurer does not act, file a complaint with your state insurance commissioner and with CMS.
• —For uninsured or self-pay patients: If you received a Good Faith Estimate and the final bill exceeds it by $400 or more ³, you can initiate the Patient-Provider Dispute Resolution process. File within 120 days of receiving the bill.
• —For all patients: Send a written dispute letter to the provider's billing department identifying the specific charges, explaining why they are incorrect or unfair, and requesting adjustment. Include any supporting evidence — your EOB, Good Faith Estimate, or pricing data from ORVO.

During any active dispute, the provider should not send the bill to collections. Request written confirmation that the account is on hold.

If your initial dispute is denied, you have multiple levels of appeal:

• —Internal appeal with your insurer — if your insurer denied coverage for the service, you have the right to an internal appeal. Your insurer must review the claim with a different reviewer and respond within 30 days (or 72 hours for urgent care).
• —External review — if the internal appeal is denied, you can request an external review by an independent third party. The external reviewer's decision is binding on your insurer.
• —Independent Dispute Resolution (IDR) — for payment disputes between providers and insurers under the No Surprises Act, either party can initiate IDR. An arbitrator selects one side's proposed payment amount. You are not involved in this process and are not responsible for any amount beyond your in-network cost-sharing.
• —State regulatory complaint — file with your state insurance commissioner or attorney general if you believe the provider or insurer is not complying with the law.

Persistence matters. Many patients give up after the first denial, but appeal success rates are substantial — especially when you have documentation showing the charges are incorrect or that surprise billing protections apply.