• Gastroenterology
  • Functional bowel disease, Gastrointestinal cancer and its prevention, Hepatology, Inflammatory bowel disease, Pancreatic disease

Areas of interest

Iron deficiency and anemia, Reflux, Peptic disease, Coeliac disease


Dr Sim Ong is an experienced consultant Gastroenterologist and Hepatologist, and holds a senior medical position at Eastern Health. She is a caring, thorough doctor and communicates well with her patients, and provides high quality care for her patients. She was awarded the prestigious NHMRC scholarship and completed her PhD through the University of Melbourne, studying the effects of treatment for haemochromatosis patients with moderately elevated iron levels. She has a keen interest in hepatitis and general gastroenterology conditions including iron deficiency anaemia, functional gut, reflux and actively participates in national bowel screening programme. She performs both gastroscopy and colonoscopy and speaks fluent Mandarin and Cantonese.

Consulting locations

Consulting Location

Eastern Gastroenterology

Level 9, Suite 4
25 Nelson road
Box Hill VIC 3128

Epworth locations


Epworth Eastern


  • MBBS
  • BMedSci
  • PhD

Education and training

  • Teaching registrars and medical students


  • Hepatitis B
  • H.pylori
  • Gastric cancers
  • Iron overload

Professional Associations

  • EASL
  • ECCO

Public Appointments

  • Box Hill Hospital
  • Maroondah Hospital

We use cookies to provide you with a customised experience which may include marketing purposes. More details can be found at our Privacy Policy.