Dr Alex Barnes is a Consultant Gastroenterologist at Flinders Medical Centre, Tennyson Centre, Flinders private Hospital and Ashford Hospital. He has a special interest in inflammatory bowel disease and bowel cancer surveillance. Other interests include endoscopy, colonoscopy and irritable bowel syndrome

Dr Barnes trained at Flinders Medical Centre and the Royal Adelaide Hospital, completing an IBD fellowship at Flinders Medical Centre where he currently practices, and has academic status at Flinders University. He previously trained and worked as a mechatronic engineer. He has completed a Masters of Public Health with the University of Newcastle. He is currently undertaking a PhD at Flinders University examining the significance and aetiology of sleep disorders, fatigue and mental health conditions in people with inflammatory bowel disease.

Dr Barnes consults at Flinders Private Hospital, and Tennsyon Centre, and performs endoscopic procedures at Ashford Hospital, Flinders Private Hospital and Tennyson Centre Day Hospital.