Dr Teoh Tiong Ann is a general surgeon at Mount Elizabeth Hospital, Singapore, with a focus on treating colon and rectal cancers. He also manages anal conditions like piles, fistulae, and fissures, and performs keyhole surgeries such as gallbladder and appendix removal. In addition, he carries out endoscopic procedures like gastroscopy and colonoscopy. After earning his medical degree from the National University of Singapore, he completed advanced surgical training and became a fellow of both the Royal College of Surgeons of Edinburgh and the Academy of Medicine of Singapore. He further deepened his expertise in colorectal surgery at the Cleveland Clinic in Florida under a Singapore Government HMDP scholarship.