Meet Ohio State's team of colon and rectal surgery experts

The Division of Colon and Rectal Surgery at The Ohio State University Wexner Medical Center houses a comprehensive team of surgeons and staff, all focused on delivering high-quality patient care, contributing to research and innovations in medicine and educating medical students and postgraduate trainees. Our surgeons are high-volume providers who have experience managing the most unusual and complex surgical cases. 

Our Leaders

Our leaders

MarkArnold slider

Mark Arnold, MD

Director, Division of Colorectal Surgery

Professor of Clinical Surgery

Vice Chairman for Surgical Education, Department of Surgery

View my bio

Our Faculty


Mark Arnold, MD

Professor-Clinical Director, Colon and Rectal Surgery

Alan Harzman, MD

Associate Professor Program Director, Surgery Residency
Current Colorectal Surgery Resident

Current Colorectal Surgery Resident

Jason Weiss, MD

MD: University of Iowa Carver College of Medicine, Iowa City
Specialty training: Residency in General Surgery, Banner Good Samaritan Medical Center, Banner – University Medical Center Phoenix, Phoenix Integrated Surgical Residency
Fellowship training: Colorectal Research and Anophysiology 2015 - 2016; Colorectal Surgery Fellowship, The Ohio State University Wexner Medical Center, Columbus