The U.S. Department of Health and Human Services formally designated ECRI as a Patient Safety Organization (PSO) in 2008. Since then, our PSO has studied nearly 4 million adverse events and near misses from over 1,400 healthcare providers nationwide across acute, ambulatory, and aging services. In this episode, we'll explore what it means to be and participate in a PSO and the evidence for how participation can benefit patient safety, and we'll briefly review some of the legal challenges to PSO protections.