Exciting Updates: New & Relocated Locations & Expert Rheumatologist Addition!

Learn More


Deborah Keller, M.D.
Colon & Rectal Surgery

Dr. Keller sees patients in our Hamden and Ansonia offices. She is affiliated with Griffin Hospital.


Deborah S Keller, M.S., M.D., is a board-certified colorectal and general surgeon. Dr. Keller specializes in robotic and laparoscopic surgery, as well as minimally invasive transanal procedures for treating colorectal cancer, diverticulitis, inflammatory bowel disease and anorectal disorders including hemorrhoids, fissures, and fistulas. Dr. Keller has clinical interests in pelvic floor disorders, including fecal incontinence and constipation, and performs specialized testing and treatment for these conditions. She has a patient-centric approach to care, and aims to improve the patient’s surgical experience.


  • Rutgers New Jersey Medical School, 2007, M.D.
  • Heinz School of Public Policy and Management, Carnegie-Mellon University, 2003, M.S., Healthcare Policy and Management
  • Carnegie-Mellon University, 2002, B.S., Biological Sciences

Board Certifications

  • Board Certified in General Surgery, 2013
  • Board Certified in Colon and Rectal Surgery, 2018

Post Graduate Training

  • Colon and Rectal Surgery Fellowship, Baylor University Medical Center, 2017
  • Colorectal Surgery Clinical Research Fellow, University Hospital Case Medical Center, 2013
  • General Surgery Residency, Temple University Hospital, 2012

Professional Memberships

  • Society of Alimentary and Gastrointestinal Surgeons
  • Colorectal Cancer Alliance
  • American Society of Colon and Rectal Surgeons
  • American College of Surgeons


  • English