Dr. Koller is a board Certified, Ivy League trained colorectal surgeon. Trained under surgical leaders in the field. He has expertise in minimally invasive surgery, including robotic, laparoscopic and Transanal excision of cancer. Dr. Koller is happy to bring his expertise on both operative and non operative (‘Watch and Wait’) treatment for rectal cancer to the South Bay for the first time. As well as, Transanal resection of rectal cancer. Bringing cutting edge care to the South Bay.

Dr. Koller also offers cutting edge, sphincter preserving care for anal fistula, robotic mesh repair of rectal prolapse.

• Colon and rectal cancer
• Diverticulitis
• Crohn’s disease
• Ulcerative colitis
• Hemorrhoids
• Anal fistula
• Fissures
• Anal cancer
• Anal dysplasia
• Rectal prolapse