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Clin Asst Prof Ong Ming Liang Andrew

Clin Asst Prof Ong Ming Liang Andrew



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, Upper & Lower GI Motility Disorders, Intestinal Ultrasound

Conditions Treated by this Doctor:
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, GERD, Hepatitis B, Hepatitis C, Intestinal Ultrasound, Irritable Bowel Syndrome (IBS), Liver Cirrhosis, Swallowing Difficulties, Swallowing Disorders.

Clinical Appointments

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

Academic Appointments

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


Dr Andrew Ong graduated with MBChB (Honours) from the University of Edinburgh in 2008 and completed his postgraduate degrees in Internal Medicine, MRCP (UK), in 2012.  He then obtained specialist accreditation in the field of Gastroenterology & Hepatology in 2016.  Subsequently, 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, Intestinal Ultrasound and Gastrointestinal motility disorders such as swallowing disorders.  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. He also holds undergraduate academic appointments in NUS Yong Loo Lin School of Medicine, Lee Kong Chian School of Medicine and Duke-NUS Medical School.


  • MRCP (UK) Royal College of Physicians (Glasgow) 2012
  • MBChB (Honours) University of Edinburgh 2008

Professional Appointments and Committee Memberships

  • Clinical Assistant Professor, Duke-NUS Graduate Medical School
  • Adjunct Assistant Professor, Yong Loo Lin School of Medicine
  • Adjunct Senior Lecturer,  Lee Kong Chian School of Medicine
  • Member, International Bowel Ultrasound Group
  • Member, American Gastroenterology Association
  • Member, Asian Neurogastroenterology & Motility Association
  • Member, European Society of Neurogastroenterology & Motility
  • Member, Gastroenterological Society of Singapore


  • Education Leader Award winner 2020, Med ACP Awards
  • Golden Apple Award winner 2018 Young Educator Award
  • Outstanding Resident Gastroenterology 2016
  • Inspiring Young Educator Award 2016
  • Outstanding Resident Gastroenterology 2014
  • Outstanding Young Educator 2013

Research Interests


  • The Practice of Gastrointestinal Motility Laboratory During COVID-19 Pandemic: Position Statements of the Asian Neurogastroenterology and Motility Association (ANMA-GML-COVID-19 Position Statements).  Siah KTH, Rahman MM, Ong AML, Soh AYS, Lee YY, Xiao Y, Sachdeva S, Jung KW, Wang YP, Oshima T, Patcharatrakul T, Tseng PH, Goyal O, Pang J, Lai CKC, Park JH, Mahadeva S, Cho YK, Wu JCY, Ghoshal UC, Miwa H. J Neurogastroenterol Motil. 2020 Jun 30;26(3):299-310.
  • Impact of COVID-19 on medical education and resident burnout in a postgraduate programme. Ong AM. Singapore Med J. 2020 Jun 26. 
  • Outrunning Burnout in a GI Fellowship Program During the COVID-19 Pandemic. Ong AM. Dig Dis Sci. 2020 Jun 9:1-3.
  • Utility of gastrointestinal ultrasound in functional gastrointestinal disorders: A narrative review. AML Ong. World J Meta-Anal. Apr 28, 2020; 8(2):109-118.
  • Treatment options for rumination syndrome: A systematic review.  AML Ong, SW Tay, YT Wang. World J Meta-Anal. Jun 30, 2019; 7(6): 297-308
  • Using the Postgraduate Hospital Educational Environment Measure to Identify Areas for Improvement in a Singaporean Residency Program. AML Ong, WWS Fong, AKW Chan, GC Phua, CK Tham. Journal of Graduate Medical Education, Vol. 11, No. 4s, August 2019: 73-78. 
  • Evaluating the educational environment in a Singaporean residency program – can we help reduce burnout rates AML Ong, WWS Fong, AKW Chan, GC Phua, CK Tham. Singapore Med J. 2019 Aug 7. 
  • Evaluation of symptomatic EGJ outflow obstruction.  AML Ong, N. Vikneswaran. Wang YT. J Gastroenterol Hepatol. 2018 Apr 16.
  • Low serum albumin predicts early mortality in patients with severe hypoxic hepatitis. Chang PE, Goh BBG, Ekstrom V, Ong AML, Tan CK. World J Hepatol 2017; 9(22)
  • 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. 2017 Dec 22
  • Quality of life in Irritable bowel syndrome – A narrative overview.  AML Ong, YT Wang. J Arch Mil Med. 2016 February
  • Gabapentin for intractable hiccups in a patient undergoing peritoneal dialysis. Ong AM, Tan CS, Foo MW, Kee TY. Perit Dial Int. 2008 

Research Trials