This report from the Office of the Assistant Secretary for Planning and Evaluation (ASPE) details key trends in factors that will be important to evaluate the No Surprises Act (NSA) and describes the framework for future evaluations. The NSA, enacted on December 27, 2020, addresses certain instances of surprise billing where individuals with private health coverage receive unexpectedly high medical bills when they are unknowingly or unavoidably treated by an out-of-network provider, facility, or provider of air ambulance services. ASPE found that overall, between 2012 and 2020, out-of-network claims decreased similarly in rural and urban areas.