Recent No Surprises Act Updates: Final Rule Introduces Significant Operational Changes for Providers, Laboratories, Facilities, and Payors

On May 28, 2026, the Departments of Health and Human Services (HHS), Labor, Treasury, and the Office of Personnel Management (OPM) finalized comprehensive updates to the Federal Independent Dispute Resolution (IDR) process established under the No Surprises Act (Division BB of the Consolidated Appropriations Act, 2021 (P.L. 116-260)). The changes are designed to improve transparency, reduce administrative burden, streamline dispute-resolution processes, and address the substantial volume of disputes submitted since the implementation of the No Surprises Act. Federal agencies have reported that more than five million disputes have been submitted through the Federal IDR process since its launch in 2022.

Key Changes Included in the Final Rule

1. Enhanced Transparency Requirements for Health Plans and Payors

The final rule requires payors (including health plans and other issuers of health insurance) to provide standardized Claim Adjustment Reason Codes (CARCs) and Remittance Advice Remark Codes (RARCs) when communicating payment determinations to out-of-network providers. These codes are intended to help providers more easily determine whether a claim may qualify for the Federal IDR process.

In addition, payors must provide more detailed identifying information, including:

• Legal business name of the plan or issuer
• Federal IDR registration number
• Additional plan identification information
• Enhanced instructions related to open negotiation requirements

These requirements are intended to improve communication between providers and payors while reducing disputes resulting from incomplete or inaccurate information.

2. Revised Open Negotiation Requirements

The final rule introduces modifications intended to improve the open negotiation process that precedes Federal IDR eligibility.

Key changes include:

• Open negotiation notices must be submitted through the Federal IDR portal.
• The 30-business-day open negotiation period begins when the notice is submitted through the portal.
• The receiving party must submit an Open Negotiation Response Notice no later than the 15^th business day of the negotiation period.

These updates are intended to increase transparency, improve documentation, and reduce disputes related to procedural eligibility requirements.

3. Expanded Batching Opportunities

One of the most significant changes for providers is expanded flexibility for batching disputes. Under the final rule, qualifying items and services may be batched under certain circumstances, including:

• Services furnished to the same patient on the same or consecutive dates of service and billed on the same claim form.
• Services billed under the same service code or comparable codes.
• Anesthesiology, radiology, pathology, and laboratory services that fall within the same Category | CPT^® code¹ section.

The final rule also permits up to 50 qualified items and services to be included within a single batched dispute. This change is expected to reduce administrative burden, improve efficiency, and lower dispute-related costs for providers and payors.

4. Introduction of the IDR Gateway

CMS also announced plans to implement a centralized platform, the IDR Gateway. The platform will be introduced in phases and is intended to serve as a single location for managing Federal IDR activities.

Expected functionality includes:

• Dispute initiation
• Dispute tracking and status monitoring
• Case management
• Participant registration
• Reporting and notifications

The IDR Gateway is intended to improve visibility into dispute activity and create a more efficient user experience for providers, facilities, and payors participating in the Federal IDR process.

5. Reduced Administrative Fees

To improve accessibility and reduce barriers to participation, the administrative fee associated with the Federal IDR process has been reduced from $115 to $15 per party, per dispute. While there is a backlog of disputes, the Federal agencies believe it is driven more by process inefficiencies, eligibility disputes, and administrative complexity than by the fee itself.

The final rule attempts to address those issues and reduce fees to improve access to the process for legitimate disputes. The reduced fee structure is designed to encourage participation while maintaining a sustainable dispute resolution program.

What These Changes Mean for Laboratories and Diagnostic Providers

Although the No Surprises Act is commonly associated with emergency and facility-based services, the final rule contains provisions that may affect laboratories and pathology providers participating in out-of-network reimbursement disputes.

Laboratories and diagnostic providers should consider:

• Reviewing remittance workflows to identify new CARC and RARC indicators.
• Updating operational procedures to accommodate revised open negotiation requirements.
• Evaluating opportunities to leverage expanded batching rules for pathology and laboratory-related disputes.
• Preparing for future integration with the CMS IDR Gateway platform.
• Monitoring additional agency guidance regarding implementation timelines and operational requirements.

For organizations managing high volumes of reimbursement disputes, the expanded batching flexibility and reduced administrative fees may create opportunities to improve operational efficiency and reduce the administrative costs associated with dispute management.