No Surprises Act Payment Disputes: A Provider Guide

Classify the disagreement

An in-network rate disagreement normally turns on the provider agreement. A denial of coverage or medical necessity calls for the plan’s appeal and external review pathways where available. An eligible out-of-network payment-amount dispute may move through open negotiation and IDR.

Read the EOB explanation and adjustment codes together with the plan’s response. Zero payment is not, by itself, proof that a claim is ineligible for IDR. The distinction is whether the dispute is about the amount payable for a covered, protected service or whether the plan covers the service at all.

CMS guidance for disputing parties

Confirm the protected service category

The federal framework covers qualifying out-of-network emergency services, certain out-of-network non-emergency services during a visit to a participating hospital, hospital outpatient department, critical access hospital or ambulatory surgical center, and out-of-network air ambulance services.

Do not treat all surgery, laboratory work or radiology as eligible simply because it was furnished out of network. Facility participation, the actual encounter, applicable notice and consent rules, and the coverage arrangement matter. Medicare, Medicaid, CHIP and TRICARE have separate payment systems.

CMS No Surprises Act policies and resources

Check state law and plan funding

The practice’s mailing address does not settle jurisdiction. Match the service location, policy and plan terms, funding status, service date and relevant state payment law. Fully insured claims may follow state payment rules; self-funded ERISA claims generally use federal IDR when eligible, subject to state opt-in and other exceptions.

Use the state guide as a screening step. Confirm the facts at claim level before selecting a portal, sending a notice or relying on a deadline.

Preserve the negotiation and filing windows

For the standard federal pathway, a party generally has 30 business days after receipt of an initial payment or notice of denial of payment to initiate open negotiation. Open negotiation lasts 30 business days. If no agreement is reached, the standard IDR initiation window is the following four business days.

Cooling-off rules, extensions and transition provisions can change the applicable window. Keep the actual receipt evidence and notice delivery record; a spreadsheet date without supporting evidence is difficult to defend.

CMS federal IDR process and deadlines

Prepare a reviewable claim packet

A useful intake packet connects the claim, remittance, plan evidence, network facts and correspondence. Reconcile patient cost sharing and previous payments so the disputed amount is clear. For a batch, preserve a line-level crosswalk rather than presenting a single unsupported total.

• Claim form, service codes, modifiers and dates.
• Initial payment or denial, EOB and QPA disclosures.
• Plan funding and state-routing evidence.
• Facility and provider network status.
• Open negotiation notice, delivery evidence and responses.
• Clinical support relevant to the disputed services.