Executive Summary
Effective January 1, 2026, the Centers for Medicare & Medicaid Services (CMS) will launch the Workforce in Surgical and Rehabilitative Services (WISeR) model, a six-year prior authorization and pre-payment review program designed to reduce fraud, waste, and abuse in Original Medicare. The model assigns 17 high-risk services across six geographic regions to private AI-powered “model participants” that will review medical necessity prior to or concurrent with payment.
For hospitals and suppliers in Arizona, New Jersey, Ohio, Oklahoma, Texas, and Washington, this represents a fundamental shift in how they manage documentation, prior authorization workflows, and revenue cycle operations. Early analysis from the Office of Inspector General (OIG) suggests denial rates of 25% or higher for services like skin substitutes and neurostimulators— categories where fraud and abuse investigations have identified systemic documentation gaps and inappropriate billing patterns.
This white paper outlines the clinical, operational, and financial implications of WISeR and provides a comprehensive roadmap for hospital operators to prepare, comply, and mitigate revenue leakage. It addresses documentation standardization, interdepartmental governance, technology enablement, and the unique challenges posed by observation status and provider-liable inpatient downgrades in settings subject to WISeR review.
