Mary Ann Johnson is a general and oesophago-gastric surgeon. Her main surgical and teaching interests are techniques for gallbladder surgery, hernia surgery, gastroscopy, ERCP and advanced oesophageal and gastric surgery, in particular oesophageal and gastric cancer. She teaches on RACS courses (ASSET and CcRISP). She currently holds a professional advisor position on the St Vincent's hospital human research ethics committee and is also a member of the clinical policy review committee. She has demonstrated her passion for research by presenting nationally and internationally. Her current research interests are improving quality-of-life for patients who have major oesophago-gastric surgery.


  • MBBS (Hons), James Cook University, 2005
  • FRACS, RACS, 2013
  • ERCP, GESA, 2016
  • Post-Fellowship Upper Gastrointestinal program, ANZGOSA, 2016

Professional Associations

  • RACS
  • AMA

Special interests

  • General Surgery: Gallbladder and hernia surgery
  • Endoscopy: ERCP/Gastroscopy
  • GORD, Anti-reflux and Hiatal hernia surgery
  • Oesophageal and Gastric cancer

Education and training

  • RACS instructor: CcRISP and ASSET
  • Provides tutorials for medical students and doctors in training


  • RCT: Pancreatic exocrine insufficiency post UGI surgery (ANZCTR):12613000269730

Epworth hospital locations


Epworth Freemasons Albert Street


Epworth Freemasons Victoria Parade

Consulting locations

Consulting Location

Epworth Eastern Specialist Centre
Ground Floor, Suite 4
120 Thames Street
Box Hill North
Clinical institute

General Surgery & Gastroenterology Clinical Institute

Mr Gary Crosthwaite profile image
Mr Gary Crosthwaite
The Institute focuses on surgical treatment of the abdominal organs, as well as the thyroid gland and hernias.