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Physician Services

Dr. Casillas


Sergio R. Casillas, MD

Dr. Casillas is a member of the medical staff since 2004, is double board-certified in General Surgery and Colon and Rectal Surgery. He did his general surgery training at the State University of New York in Syracuse, New York, then specialized in Colon and Rectal surgery followed by a fellowship in minimally invasive surgery at The Cleveland Clinic Foundation, in Cleveland, Ohio. He has been named one of the Top Doctors in the state by Connecticut Magazine for three consecutive years.

Dr Casillas specializes in the surgical treatment of a wide range of gastrointestinal problems, including colorectal cancer, colorectal polyps, diverticulitis, rectal prolapse, inflammatory bowel disease, crohn’s disease, ulcerative colitis, anorectal disease, hemorrhoids, fistulas, fissures, and fecal incontinence.

He also performs a wide range of general surgical procedures including gallbladder surgery, hernia, soft tissue masses, breast surgery, and skin lesions. Most of his surgeries are done with the latest minimally invasive techniques including robotic surgery using the Da Vinci robotic system.

Medical School: La Salle University, Mexico City, Mexico
Internship: State University of New York Upstate Medical Center
Residency: State University of New York Upstate Medical Center
Fellowship: The Cleveland Clinic Foundation
Board Certification: Surgery/Colon & Rectal Surgery