Clin Asst Prof Ong Han Lim

Dr Ong Han Lim is a Consultant Paediatric Surgeon at KK Women’s and Children’s Hospital (KKH), Singapore. In addition to general paediatric surgery, his clinical interests include paediatric colorectal surgery, neonatal surgery, minimally invasive paediatric surgery, and paediatric and adolescent bariatric surgery.

Dr Ong completed a fellowship in Paediatric and Neonatal Surgery at the internationally renowned Great Ormond Street Hospital for Children in London, United Kingdom. In addition to his clinical practice, he is actively involved in teaching medical students and surgical trainees, and holds academic appointments with Duke-NUS Medical School and the Lee Kong Chian School of Medicine.

Dr Ong has a strong interest in the management of complex colorectal conditions in children, including congenital bowel disorders, faecal incontinence following surgery, and chronic constipation. He is actively involved in developing specialised paediatric bowel management programmes and utilising advanced diagnostic tools such as high-resolution anorectal manometry (HRAM) to guide treatment and improve long-term outcomes. He is passionate about improving the quality of life of children through multidisciplinary care, innovation in diagnostics and therapy, and the development of specialised services, including paediatric bowel management and adolescent bariatric surgery.

• Consultant, Department of Paediatric Surgery, KK Women’s and Children’s Hospital, Singapore
• Visiting Consultant, Singapore General Hospital
• Clinical Assistant Professor, Duke-NUS Medical School, Singapore
• Adjunct Senior Lecturer, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
• Fellow, Academy of Medicine Singapore (Paediatric Surgery)

• Singapore Health Quality Service Award (Gold), SingHealth, 2022
• Service from the Heart Award, KK Women’s and Children’s Hospital, 2020
• Long Service Award, KK Women’s and Children’s Hospital, 2017
• Long Service Award, KK Women’s and Children’s Hospital, 2026

• Candy crush: a confounding presentation of blood per rectum in a child. Yvonne Ying Ru Ng, Han Lim Ong, Siam Wee Sim, Caroline Choo Phaik Ong. BMJ Case Reports 28 July 2015; doi:10.1136/bcr-2015-211634
• Sacrococcygeal teratoma with intraspinal extension: A case series and review of literature. Jesse Seilern Und Aspang, Katherine Mary Burnand, Han Lim Ong, Kate Cross, Dominic Thompson, Stefano Giuliani. Journal of Pediatric Surgery 15 February 2020; doi: 10.1016/j.jpedsurg.2020.02.003
• Urothelial carcinoma in a child with gross hematuria – a complaint not to be dismissed. Han Lim Ong, Han Jie Lee, Tze Kiat Ng, Te-Lu Yap. BMJ Case Reports 1 December 2021; doi: 10.1136/bcr-2021-247239
• Identifying Risk Factors for Neonatal Gastric Perforation: A Scoping Review and Case Series in a Tertiary Centre. Han Lim Ong, XuXin Lim, Te-lu Yap. Journal of Neonatology, volume 40, Issue 2, Pages 179-192, doi: 10.1177/09732179251337215
• Surgical Management of Gastric Duplication Cyst with Respiratory. Epithelium in an Asymptomatic Child. Jayne Chiang, Pallavi Basu, Han Lim Ong. BMJ Case Rep. 2026; 19:e266318, doi: 10.1136/bcr-2025-266318