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Assoc Prof Andrew Wong Siang Yih

Assoc Prof Andrew Wong Siang Yih

MBBS (S’pore), FRCS(Edin), FAMS

Senior Consultant

Changi General Hospital

Specialty: General Surgery

Clinical Appointments

  • Deputy Chairman, Medical Board (Surgical Disciplines) Changi General HospitalChangi General Hospital
  • Senior Consultant Upper Gastrointestinal & Bariatric Surgery Changi General HospitalChangi General Hospital
  • Senior Consultant Surgery Changi General HospitalChangi General Hospital


Dr Andrew Wong is the current deputy chairman, Medical Board (Surgical Disciplines) and a Senior Consultant at the Department of Surgery at Changi General Hospital (CGH).

Dr Wong received his medical degree from the National University of Singapore in 1995. He had specialty training at the Department of Surgery in CGH, followed by fellowship training in oesophagogastric surgery at the Royal Adelaide Hospital in South Australia. His subspecialty interest is in oesophagus and gastric surgery, bariatric and metabolic surgery as well as minimally invasive surgery.


  • ​Fellowship in Oesophagogastric Surgery (Royal Adelaide Hospital, South Australia)
  • Specialist Accreditation in General Surgery (Singapore)
  • FRCS (Edinburgh)
  • MBBS (Singapore)

Professional Appointments and Committee Memberships

  • Associate Professor - NTU Lee Kong Chian Medical School
  • Chairman - Laparoscopic Credentialing Committee, Changi General Hospital
  • Clinical Associate Professor - Duke-NUS
  • Clinical Associate Professor - NUS Yong Loo Lin School of Medicine
  • Co-Director - Endoscopy Centre, Changi General Hospital
  • Deputy Chairman, Medical Board (Surgical Disciplines) - Changi General Hospital
  • Fellow - College of Surgeons, Academy of Medicine Singapore
  • Fellow - Royal College of Surgeons of Edinburgh
  • Founding Secretary - Obesity and Metabolic Surgery Society of Singapore
  • Member - Academic Council, SingHealth Duke-NUS Surgery Academic Clinical Programme
  • Member - Clinical Competency Committee, SingHealth General Surgery Residency Programme
  • Member - Gastric Cancer Awareness Month Committee, Singapore Cancer Society
  • Member - GI Endoscopy Credentialing Committee, Changi General Hospital
  • Member - International Federation for the Surgery of Obesity and Metabolic Disorders
  • Member - Medical Board, Changi General Hospital
  • Member - Medical Specialist Panel for General Surgery, Work Injury Compensation Medical Board, Ministry of Manpower
  • Member - Resident Advisory Committee for General Surgery


  • ​Annals of the Academy Gold Reviewer Award 2017
  • Singapore Medical Journal Reviewer Recognition Award 2016
  • Dean's Award for Teaching Excellence (AY2015/2016), Yong Loo Lin School of Medicine, NUS
  • National Day Award 2016, Commendation Medal (Military)
  • 20 Year Long Service Award (2016), Changi General Hospital
  • 2015 Best Educator Award for Medical – Undergraduate Education, 6 November 2015
  • Faculty Appreciation Award (AY2013-2014), RISE Awards Ceremony 2015, SingHealth Residency
  • Outstanding Faculty Award, RISE Awards Ceremony 2015, SingHealth Residency, 13 Aug 2015
  • Singapore Medical Journal Best Research Paper Award (Second Prize) 2014
  • Singapore Medical Journal Reviewer Recognition Award 2014
  • Star Award, Eastern Health Alliance Caring Award, April 2013 – March 2014
  • Changi General Hospital Best Educator Award for Medical (Postgraduate) 2013
  • Eastern Health Alliance Gold Caring Award 2013
  • SingHealth Residency Outstanding Faculty Award 2012-2013 
  • Changi General Hospital Best Teacher Award (Medical Undergraduates) 2009/2010
  • Yong Loo Lin School of Medicine, NUS Dean's Award for Teaching Excellence 2009/2010
  • Singapore Health Quality Service Gold Award 2011
  • Changi General Hospital Best Service Award July – September 2011
  • Singapore Health Quality Service Silver Award 2010
  • 10-Year Long Service Award (2006) Changi General Hospital

Research Interests

  • Adrenal surgery
  • Oesophageal cancer
  • Gastric cancer
  • Anti-reflux surgery
  • Bariatric surgery


  • ​Roux-en-Y or Billroth II Reconstruction After Radical Distal Gastrectomy for Gastric Cancer – A Multicenter Randomized Controlled Trial. Annals of Surgery (2017). Jimmy Bok-Yan So, Jaideepraj Rao, Andrew Siang-Yih Wong, Yiong-Hwak Chan, Ning Qi Pang, Amy Yuh Ling Tay, Man Yee Yung, Zheng Su, Janelle Niam Sin Phua, Asim Shabbir and Enders Kwok Wai Ng
  • Our Clinical Experience of Self-Expanding Metal Stent for Malignant Central Airway Obstruction. J Clin Med Res. 2017:9(1):58-63. Akash Verma, Chee Kiang Phua, Qiu Mei Wu, Wen Yuan Sim, Audrey Wee Chuan Rui, Soon Keng Goh, Benjamin Ho, Ai Ching Kor, Andrew SY Wong, Albert YH Lim, Dessmon YH Tai, John Abisheganaden
  • Insight into the da Vinci® Xi – technical notes for single-docking left-sided colorectal procedures. The International Journal of Medical Robotics and Computer Assisted Surgery 2016 Dec. James Chi-Yong Ngu, Sarah Sim, Sulaiman Yusof, Chee-Yung Ng, Andrew Siang-Yih Wong
  •  Long term outcome of Barrett's esophagus in Singapore. Journal of Gastroenterology and Hepatology 2016 (31) 21-26. Camelia Qian Ying Tang, Tiing Leong Ang, Daphne Shih Wen Ang, Sean Wei Hong Lai, Andrew Boon Eu Kwek, Andrew Siang Yih Wong, Kwong Ming Fock
  •  Small bowel obstruction in the virgin abdomen: time to challenge surgical dogma with evidence. ANZ J Surgery (2016) doi: 10.1111/ans.13714. Yvonne Ying-Ru Ng, James Chi-Yong Ngu and Andrew Siang-Yih Wong
  •  Transanal natural orifice specimen extraction in colorectal surgery: bacteriological and oncological concerns. ANZ J Surg 86 (2016) 299-302. James Ngu and Andrew Siang Yih Wong
  •  Para-oesophageal and parahiatal hernias in an Asian acute care tertiary hospital: an underappreciated surgical condition. Singapore Med J 2016; 57(12): 669-675. Ye Xin Koh, Lester Wei Lin Ong, June Lee, Andrew Siang Yih Wong
  •  Can venous base excess replace arterial base excess as a marker of early shock and a predictor of survival in trauma? Singapore Med J 2016;57(2):73-76. Ramesh Wijaya, Jia Hui Ng, Lester Ong, Andrew Siang Yih Wong
  •  Peculiar case of calcifying fibrous tumour presenting as a free-floating intraperitoneal body. J Case Rep Images Surg 2015;1:29-33. Jia Lin Ng, Hema Parag Salkade, Sulaiman Yusof, Wee Teng Poh, Andrew Siang Yih Wong
  •  Laparoscopic Management of Complicated Foreign Body Ingestion: A Case Series. Int Surg 2015;100:849-853. Daryl K. A. Chia, Ramesh Wijaya, Andrew Wong, Su-Ming Tan
  • Letter to the Editor: "Schistosomal appendicitis with portal hypertension". Int J Colorectal Dis, Published online: 20 February 2015. Ramesh Wijaya, Jia Hui Ng, Shoun Tan, Andrew SY Wong
  • Perforated duodenal diverticulum as an unusual sequelae of intestinal obstruction. ANZ Surgery 2014 May 30 epub ahead of print. Koh YX, Chok AY, Wong AS
  • Resolving The Diagnostic and Management Dilemma: A Case of Giant Sporadic Mesenteric Fibromatosis and Review Of The Literature. World Journal of Colorectal Surgery. Volume 4, Issue 4, 2014, Article 5. Ramesh Wijaya, Manraj Singh, Adrian Jit Hin Koh, Andrew Siang Yih Wong
  • The use of a second biopsy from the gastric body in the detection of Helicobacter pylori using rapid urease test during gastroscopy. Singapore Med J 2014; 55(12): 644-647. Wong SYA, Ching SS, Long AS
  • Secondary stent-in-stent self-expanding metallic stent placement for early stent occlusion due to mucosal oedema in the gastrojejunal anastomosis after palliative subtotal gastrectomy for locally advanced gastric cancer. Singapore Med J 2013; 54(12): e240-e243. Aik-Yong Chok, Ye-Xin Koh, June Lee, Andrew Siang-Yih Wong
  • Laparoscopic mesh repair of parahiatal hernia: A case report. Asian J Endosc Surg 6 (2013) 231-233. Pei Shi Lew, Andrew Siang Yih Wong
  • Bariatric surgery in Singapore from 2005 to 2009. Asian Journal of Surgery; (2013) 36, 36-39. Rajat Goel, Amit Agarwal, Asim Shabbir, Jimmy So, Shanker Pasupathy, Andrew Wong, Anton Cheng, Davide Lomanto
  • Rare cause of acute surgical abdomen with free intraperitoneal air: Spontaneous perforated pyometra. A report of 2 cases. Am J Case Rep; 2012; 13:55-57. Siew Fung Lim, Song Liang Lee, Adrian Kah Heng Chiow, Chek Siang Foo, Andrew Siang Yih Wong, Su-Ming Tan
  • Bariatric Surgery in Asia in the Last 5 Years (2005-2009). Obes Surg; Epub 2011 Oct 28. Davide Lomanto & Wei-Jei Lee & Rajat Goel & Jeannette Jen-Mai Lee & Asim Shabbir & Jimmy BY So & Chih-Kun Huang & Pradeep Chowbey & Muffazal Lakdawala & Barlian Sutedja & Simon K. H. Wong & Seigo Kitano & Chin Kin Fah &
Hildegardes C. Dineros & Andrew Wong & Anton Cheng & Shanker Pasupathy & Sang Kuon Lee & Paisal Pongchairerks & Tran Binh Giang
  • Esophageal pH profile following laparoscopic total fundoplication compared to anterior fundoplication. J Gastrointest Surg; 2008 Aug;12(8):1341-5. Epub 2008 Feb 26. ASY Wong, JC Myers, GG Jamieson
  • Delayed presentation of a patient with a ruptured diaphragm complicated by gastric incarceration and perforation after apparently minor blunt trauma. Can J Emerg Med 2004; 6(4):277-80. Goh BKP, Wong ASY, Tay KH, Hoe MNY

Research Trials