Colon & Rectal Surgery

The Division of Colon and Rectal Surgery was established in 2013. Since then, we have grown into a strong division of six surgeons, establishing a presence throughout San Diego with practices in Hillcrest, La Jolla, Encinitas and the Veterans Administration. Our faculty provide innovative, high-quality care to patients with complex conditions, such as colon and rectal cancers, inflammatory bowel disease, and complicated benign disease such as diverticulitis, anorectal disorders and pelvic floor conditions. We work collaboratively with physicians from the Digestive Diseases Center, Comprehensive Cancer Center and Center for Pelvic Health for unparalleled multidisciplinary care. Additionally, our surgeons serve as leaders in professional organizations, imparting groundbreaking research and surgical techniques to peers around the world.

Surgeons Specializing in Colorectal Surgery

Dr. Sonia Ramamoorthy

Sonia Ramamoorthy, MD, FACS, FASCRS
Professor of Surgery
Chief, Division of Colon and Rectal Surgery
Director of Surgical Quality, NSQIP
Disease Team Leader, Colorectal Cancer


Ben Abbadessa, MD
Assistant Professor of Surgery

Dr. Bard Cosman

Bard Cosman, MD, FACS, FASCRS
Professor of Clinical Surgery

Dr. Samuel Eisenstein

Samuel Eisenstein, MD
Assistant Professor of Surgery

Nicole Lopez

Nicole Lopez, MD
Assistant Professor of Surgery

Lisa Parry

Lisa Parry, MD
Assistant Professor of Surgery

Patient Care


Christina Castillo
Executive Administrative Assistant to Sonia Ramamoorthy, MD, and Bard Cosman, MD
Phone: 858-822-6277
Fax: 858-228-1731

Maureen Cavanagh, RN
Nurse case manager to Colorectal Surgery
Phone: 858-822-0705

Contact Us

Moores Cancer Center
Colorectal Surgery
3855 Health Sciences Dr.
La Jolla, CA 92093-0987
Phone: 858-822-6277
Fax: 858-822-6263