Qin C, et al. - Researchers evaluated the influence of the outpatient setting of surgical care on the risk of adverse events and readmission after non-arthroplasty shoulder surgery. Further, they sought for risk factors associated with these adverse events. Searching the Humana Claims Database, they included a total of 84,658 eligible patients. Of these, 28,730 patients had undergone arthroscopic shoulder surgery and related open procedures in the ambulatory surgical center (ASC) setting and 56,819 patients had undergone the procedures in the hospital-based outpatient department (HOPD). The HOPD cohort had greater unanticipated admission after surgery, readmission, deep vein thrombosis, pulmonary embolism, and wound infection within 90 days of surgery. Unplanned admission was observed in correlation to increasing Charlson Comorbidity Index (odds ratio [OR], 1.16); HOPD service location (OR, 2.37); general anesthesia (OR, 1.34); male sex (OR, 2.58); and open surgery (OR, 2.35). These findings support that the ASC cohort had lower rates of perioperative morbidity indicating that proper patient selection is taking place and lending reassurance to surgeons who are practicing or are considering practicing in an ASC. Management in HOPDs is recommended for patients with risk factors for unplanned admission as admission from an ASC can be difficult and potentially unsafe.