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Clin Assoc Prof Ong Ming Liang Andrew

Clin Assoc Prof Ong Ming Liang Andrew

MBChB (Hons), MRCP (UK), FAMS (Gastro), MMedEd (Dundee)

Senior Consultant

Specialty: Gastroenterology & Hepatology, Gastroenterology and Hepatology

Sub-specialties: Diagnostic and Therapeutic Endoscopy, Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome & Complex Functional GI Disorders, General Hepatology, Esophageal Manometry & pH Monitoring, Intestinal Ultrasound, Pelvic Floor Disorders, Neurogastroenterology, Anorectal Manometry

Conditions Treated by this Doctor:
Bloating, Burping/Belching Disorders, Chronic Abdominal Pain, Chronic Constipation, Chronic Diarrhoea, Colon Cancer Screening, Colonic Polyps, Colorectal Cancer Screening, Esophageal Manometry, Esophageal pH Monitoring, Faecal Incontinence, Fatty Liver, Functional Dyspepsia, Gastrooesophageal Reflux, Gastro-oesophageal Reflux Disease (GERD), Hepatitis B, Hepatitis C, Intestinal Ultrasound, Irritable Bowel Syndrome (IBS), Liver Cirrhosis, Pelvic Floor Disorders, Swallowing Difficulties, Swallowing Disorders.

Clinical Appointments

  • Senior Consultant Gastroenterology & Hepatology Singapore General HospitalSingapore General Hospital
  • Programme Director, Gastroenterology Residency Programme SingHealth

Academic Appointments

  • Clinical Associate Professor, Duke-NUS Graduate Medical School
  • Adjunct Assistant Professor, NUS Yong Loo Lin School of Medicine
  • Adjunct Senior Lecturer, Lee Kong Chian School of Medicine


Dr Andrew Ong graduated with MBChB (Honours) from the University of Edinburgh and completed his postgraduate degrees in Internal Medicine, MRCP (UK). He then obtained specialist accreditation in the field of Gastroenterology & Hepatology. He completed his fellowship training at Alfred Hospital & Monash University, Melbourne, where he learnt advanced integrated medical, psychological and dietary management of Irritable Bowel Syndrome and other functional gastrointestinal and motility disorders. From this fellowship, he also was trained in intestinal ultrasound and became one of the pioneering gastroenterologists in Singapore to use intestinal ultrasound in the non-invasive evaluation of bowel disorders.

His areas of interest include Irritable Bowel Syndrome, Gastro-oesophageal reflux disease, Pelvic Floor Disorders and Gastrointestinal motility disorders such as swallowing disorders. As such, his practice often includes challenging cases of chronic abdominal pain, constipation and bloating. He runs the Gastrointestinal Function Unit (GIFU) in SGH and is trained to perform oesophageal high resolution manometry, pH studies and anorectal manometry studies.

He has a particular interest in medical education and has received several teaching awards for his contribution to medical education. He was previously the Associate Programme Director in SingHealth Internal Medicine Residency programme from 2017 to 2019, and is currently the Programme Director of Singhealth Gastroenterology Residency Programme. His other leadership positions include Deputy Director, Faculty Development, Singhealth Medicine Academic Clinical Program and he serves as a part time consultant for faculty development to Ministry of Health, Singapore.


  • Masters in Medical Education, MMedEd (Dundee)
  • MRCP (UK) Royal College of Physicians (Glasgow)
  • MBChB (Honours) University of Edinburgh

Professional Appointments and Committee Memberships

  • Honorary Secretary, Executive Committee, Gastroenterological Society of Singapore (GESS)
  • Chairperson, Oesophageal pH and Manometry Testing Clinical Guideline Committee, Chapter of Gastroenterologist, Academy Medicine of Singapore
  • Scientific Committee, Asian Neurogastroenterology & Motility Association (ANMA)
  • Member, Australasian Neurogastroenterology and Motility Association (ANGMA)
  • Member, Association for Medical Education Europe (AMEE)
  • Member, Rome Foundation Psychogastroenterology
  • Member, Academy of Endoscopy (AoE)


  • Distinguished Educator Award, Singhealth Excellence Award 2023
  • Special Commendation Award, RISE Awards 2023
  • Dean's Award for Teaching Excellence, NUS MedACE 2023 
  • Outstanding Faculty Award, RISE awards 2021
  • Education Leader Award, Med ACP Awards 2020
  • AMEI Golden Apple Young Educator Award 2018

Research Interests


  1. Approach to Remediating the Underperforming Endoscopic Trainee.
    Grover S, Andrew Ong, Bollipo S, Dilly C, Siau K, Walsh C
    Gastroenterology 2023. 
  2. Entrust Me: Embedding Entrustable Professional Activities in a Gastroenterology Residency Program
    AML Ong
    Dig Dis Sci 2023 Jan 7. doi: 10.1007/s10620-022-07815-y. 
  3. Medical Education Blog and Podcast Utilization During the COVID-19 Pandemic
    Patrick E. Boreskie , Teresa M. Chan, Chris Novak, Adam Johnson, Jed Wolpaw, Andrew Ong, Katherine Priddis, Pranai Buddhdev, Jessica Adkins, Jason A. Silverman, Tessa Davis, James E. Siegler
    Cureus 2022. Mar 21;14(3):e23361. doi: 10.7759/cureus.2336.
  4. Guidance on performance and reporting of High-Resolution Oesophageal Manometry and Ambulatory pH Monitoring in Singapore
    Andrew Ming Liang Ong, Alex Soh, Wang Yu Tien, Reuben Wong, Christopher Chia, Kewin Siah, Daphne Ang
    Ann Acad Med Singap 2021; 50:629-37.
  5. Value of a Growth Mindset: Improving Endoscopy Coaching and Mentoring
    Andrew Ming Liang Ong, Keith Siau
    Dig Dis Sci 2021 Oct 27.
  6. The impact of the coronavirus disease 2019 pandemic on gastroenterologists in Southeast Asia: a mixed-methods study
    John Ong, Andrew Ming Liang Ong, Sharon Ong, Xiaohui Xin, Yeong Yeh Lee, Nonthalee Pausawasdi, Mark Anthony De Lusong, Dadang Makmun, Vui Heng Chong, Shiaw Hooi Ho, Wanyen Lim, David Ong, Yock Young Dan, Christopher Khor.
    Journal of Gastroenterology & Hepatology 2021. 2021 Jun 22
  7. Pondering the Pandemic’s Problems: A Program Director’s Perspective
    Andrew Ming Liang Ong
    Dig Dis Sci. 2021 Feb 3.
  8. Mindfulness-based Cognitive Therapy in Functional Dyspepsia: A Pilot Randomized Trial
    Kevin Teh; Ng, Yi-Kang; Doshi, Kinjal; Tay, Shu-Wen; Hao, Ying; Ang, Lui-Yee; Foong, Henry Lew-Yuen; Ong, Andrew; Siah, Kewin Tien Ho; Chan Pak Wo, Webber; Ong, Wai Choung; Mesenas, Steven Joseph;, Chee-Hooi; Wang, Yu Tien
    Journal of Gastroenterology & Hepatology August 2021; 36(8)
  9. Diaphragmatic breathing reduces belching and reflux symptoms in proton pump inhibitor refractory gastroesophageal reflux disease
    AML Ong, LTT Chua, CJL Khor, A.Ravishankar, N.Vikneswaran, Wang YT
    Clin Gastroenterol Hepatol. 2018 Mar;16(3):407-416.e2

Research Trials