Division of Colorectal Surgery

Patient Care  |  Education  |  Research  |  Faculty  |  Contact  |  Support

Columbia’s Division of Colorectal Surgery is dedicated to leading the field of colon and rectal surgery through top-quality clinical care, academic excellence, and pioneering research. The caregivers in our division share a common mission:

  • to provide ready access to expert care for afflicted with diseases of the bowel
  • to be a place of last resort for those who have nowhere else to go
  • to provide comfort and support to our patients and their families
  • to create a legacy by teaching caregivers of the future
  • to advance care through relevant research

Patient Care

Columbia’s Colorectal division offers specialized services in multiple areas of expertise, including a multidisciplinary colorectal cancer care program, one of the country’s only interventional IBD centers, dedicated programs for anorectal conditions like hemorrhoids, and more. We offer minimally invasive and robotic surgery, techniques for preserving long-term continence, and have expertise in doing complex reoperative procedures. Above all, we are committed to bringing out patients the highest quality, compassionate and convenient care possible. If you or a loved one is interested in our services, learn more on our clinical care site:

Colorectal Surgery Patient Care Site
Appointment Phone: (212) 342-1155
Fax: (212) 305-0267

Education & Training

Our leadership in colorectal care has made us a destination for trainees and experienced medical professionals around the world eager to learn the latest techniques and treatments. Through fellowship programs for both colorectal surgery and inflammatory bowel disease, as well as through continuing medical education events, we are nurturing the next generation of great colorectal surgeons. Learn more about our educational and training programs:

Colorectal Section Fellowship Program
Advanced IBD Fellowship Program
Continuing Medical Education Events


Research is integral to our mission to improve our understanding of colorectal disease, optimize current therapies, and develop new and more effective treatments. We conduct clinical research on an ongoing basis in order to fulfill this mission, as well as collaborate with a multidisciplinary team of research specialists to discover how we can deliver better care. Learn more about our clinical research:

About Our Research
Clinical Trials


Dr Cary B. AaronsCary B. Aarons, MD
Interim Chief, Division of Colorectal Surgery

Dr Debbie BakesDebbie Bakes, MD

Dr Ravi KiranP. Ravi Kiran, MD

Dr James ChurchJames M. Church, MD


Usama Ahmed Ali, MD

Usama Ahmed Ali, MD


Dr Adil Haleem Khan

Adil Haleem Khan, MD


Dr David SchwartzbergDavid Schwartzberg, MD


Dr Marco ZoccaliMarco Zoccali, MD
Colorectal Surgeon

Dr Beatrice DionigiBeatrice Dionigi, MD


Joseph Riad, MDJoseph Riad, MD


As a marker of our commitment to multidisciplinary care, the division also includes gastroenterologists amongst our faculty:

Dr Bo ShenBo Shen, MD

Dr Le-Chu SuLe-Chu Su, MD, PhD

Administrative Contact

Tyree Perez
Division Administrator, Colorectal Surgery
Email: tp2301@cumc.columbia.edu
Phone: (212) 342-1155

News & Announcements

Leading Colorectal Cancer Expert Joins Colorectal Faculty

James Church, MD, a pioneer in hereditary colon cancer care, brings decades of experience to Columbia’s team.

Support Our Division

Your support is vital to helping us expand our services, continue our groundbreaking research, and offer as many patients as possible access to quality care. We rely on donations from both individuals and organizations year round in order to advance our patient care programs, as well as our many research, fellowship, and educational initiatives. Learn how you can partner with us by providing vital funding for our work:

Ways to Help

More Contacts & Locations

Colorectal Surgery Patient Site

Appointments: (212) 342-1155

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