Henderson WG, Rozeboom PD, Bronsert MR, et al. - In view of the high accuracy demonstrated by the universal Surgical Risk Preoperative Assessment System prediction models for postoperative adverse outcomes for estimating risk in broad surgical populations and for surgical specialties, researchers sought to evaluate the Surgical Risk Preoperative Assessment System in predicting adverse outcomes for selected individual operations. They applied the Surgical Risk Preoperative Assessment System models to the top 2 most frequent common procedural terminology codes in 9 surgical specialties and 5 additional common general surgical operations in the 2009 to 2018 database of the American College of Surgeons National Surgical Quality Improvement Program. For some of the 23 studied operations, but not for all, the Surgical Risk Preoperative Assessment System demonstrated accuracy in estimating postoperative adverse events. In the procedures where Surgical Risk Preoperative Assessment System was not precise, they suggest developing disease or operation-specific risk models.