Dr Tattersall is a consultant gastroenterologist with appointments at North Shore Private Hospital, Royal North Shore Hospital, the Mater Hospital and Macquarie University Hospital. He provides comprehensive gastroenterology care and is accredited in endoscopic procedures such as gastroscopy and colonoscopy.

Dr Tattersall has an interest in all gastroenterology but his practice has a particular focus on inflammatory bowel disease, bowel cancer screening and gastro-oesophageal reflux.