Gary A. Bass, MD, MSc, MBA, PhD, FEBS (Em Surg) is a trauma and emergency surgeon, and intensivist with a focus on global surgery, implementation science, and data-driven quality improvement in acute care surgery and surgical critical care. He is an Assistant Professor of Surgery at the University of Pennsylvania’s Perelman School of Medicine and a Senior Scholar at the Center for Perioperative Outcomes Research and Transformation (CPORT).
Dr. Bass is internationally-recognized for his leadership in large-scale, multinational observational research in emergency general surgery, serving as Principal Investigator for the ESTES SnapSBO study, a time-bound prospective cohort study on small bowel obstruction management across Europe. His work bridges epidemiology, health services research, and surgical outcomes, integrating real-world clinical data with advanced statistical methodologies to identify practice variations, optimize surgical decision-making, and improve patient outcomes.
He is particularly interested in causal inference methods in surgical epidemiology, with a focus on instrumental variable analysis, latent class modeling, and target trial emulation to evaluate the effectiveness of non-operative strategies in emergency surgery. As Chair of the ESTES Research Committee, he has spearheaded snapshot audit methodologies that generate high-impact, collaborative research across multiple healthcare systems.
Dr. Bass’s work is supported by a strong foundation in health economics, biostatistics, and implementation science, and he actively collaborates with multidisciplinary teams to translate evidence into practice in both high-resource and resource-limited settings.
