You can dispute an out-of-network charge by filing a written appeal with your insurance company, including the itemized bill, your denial letter, and supporting documentation. The No Surprises Act, effective January 2022, prohibits surprise billing when you receive emergency care or services from an out-of-network provider at an in-network facility without choosing them—and even when the Act doesn't apply, you have federal rights to challenge billing errors.
Your first step is always requesting a complete itemized bill from the provider. Review it for accuracy, then decide whether the charge falls under federal protections or represents a billing error. The path forward differs depending on what went wrong.
Table of Contents
- When the No Surprises Act Protects You
- Filing a Formal Dispute
- Insurance Company Response Timelines
- Escalating Beyond Your Insurance Company
- When the Dispute Is Between Your Insurer and Provider
- Frequently Asked Questions
When the No Surprises Act Protects You
The No Surprises Act shields you from out-of-network charges in two specific situations: emergency care and non-emergency services from an out-of-network provider at an in-network facility where you did not select them. In both cases, you cannot be charged more than your in-network cost-sharing amount—typically your standard copay, deductible, and coinsurance.
If your out-of-network charge exceeds your in-network cost-sharing amount, the law may apply. Contact the federal No Surprises Act Help Desk at 1-800-985-3059 to confirm whether the law covers your bill. The Help Desk guides you through your options and helps resolve surprise billing disputes directly.
Filing a Formal Dispute
You must include the denial letter, itemized charges, and supporting medical records with your appeal. Submit your dispute to your insurance company within 60 days of receiving a claim denial or the original bill. Send your dispute by certified mail with return receipt or through your provider's patient portal, specifying each disputed line item, the reason for the dispute, and requesting a written response within 30 days. Keep copies of everything you send—you will need them if the dispute moves to the next stage.
Insurance Company Response Timelines
your insurance company must respond within 60 days for a standard appeal. If your case is urgent—such as a time-sensitive treatment or imminent financial hardship—you can request an expedited appeal, which requires a decision within 72 hours. The insurer will either uphold the charge, remove it, or adjust it.
If the insurer denies your appeal, they must tell you how to request external review. An independent third party, not connected to your insurance company, will examine your case and issue a binding decision.
Escalating Beyond Your Insurance Company
If your insurance company refuses to address a billing error or ignores your dispute after 60 days, escalate to your state's insurance commissioner or state attorney general's consumer protection office. These agencies can investigate complaints and enforce state insurance regulations. They can pressure an unresponsive insurer and sometimes recover money on your behalf.
Document every step: dates of calls, names of representatives, what was promised, and what actions were taken. This record proves your insurer's inaction and strengthens your complaint to the state.
When the Dispute Is Between Your Insurer and Provider
If your out-of-network charge results from a dispute between the provider and insurer over what the provider should be paid—not from the claim being denied—the federal Independent Dispute Resolution (IDR) process applies. The filing fee is $15 per dispute as of June 2026. Be aware: providers won 88% of out-of-network disputes through IDR in early 2025, often receiving three to four times the in-network rate when they prevail.
Your insurer may push the dispute to IDR because they believe they will lose—which means you might end up owing more than the in-network rate. Understand this risk before your case reaches IDR.
Frequently Asked Questions
Can I dispute a charge the hospital collected before insurance was billed?
Yes. Request an itemized bill, verify the charge, and file the same dispute with the provider or your insurance company. The same 60-day filing window and documentation rules apply.
What if the out-of-network provider won't respond to my dispute?
Contact your state's insurance commissioner. If the dispute involves a rate disagreement between the insurance company and provider, you can escalate to the federal Independent Dispute Resolution process.
How long does a dispute usually take to resolve?
Standard appeals take up to 60 days; expedited appeals take up to 72 hours. External review after a denial can add 30 days or more. If the dispute reaches IDR, expect months.