About Dr Marius van Rijnsoever
Specialist care for digestive, liver, biliary and pancreatic conditions.
Dr Marius van Rijnsoever provides practical, patient-centred gastroenterology care with a focus on clear explanations, careful investigation and personalised treatment plans.
Patient-centred gastroenterology care
Dr Marius looks after patients with conditions affecting the oesophagus, stomach, small bowel, colon, liver, bile ducts and pancreas. This includes inflammatory bowel disease, irritable bowel syndrome, reflux, abdominal pain, bowel symptoms, abnormal liver tests, pancreatic and biliary disorders, and bowel cancer prevention.
He believes that good care starts with helping patients understand what is happening. His approach is to identify the underlying cause where possible, explain the options clearly, and create a practical plan tailored to the individual patient.
Areas of care
- Inflammatory bowel disease
- Irritable bowel syndrome
- Reflux and indigestion
- Abdominal pain
- Abnormal liver tests
- Bile duct disorders
- Pancreatic conditions
- Bowel cancer prevention
Advanced endoscopy
Dr Marius has extensive experience in diagnostic and therapeutic endoscopy. He performs both routine and advanced procedures, with a special interest in minimally invasive treatments that can avoid or reduce the need for major surgery.
- Gastroscopy
- Colonoscopy
- Flexible sigmoidoscopy
- Endoscopic mucosal resection
- Endoscopic ultrasound
- ERCP
- SpyGlass cholangioscopy
- Endoscopic drainage of pancreatic collections
- Endoscopic stenting
During his advanced interventional endoscopy work at Waitematā DHB, Dr Marius helped introduce newer endoscopic techniques for the treatment of pancreatic fluid collections. These techniques improved outcomes for seriously unwell patients, reduced time in intensive care and created significant cost savings for the public health system.
Training and professional background
Dr Marius graduated from the University of Notre Dame medical school in Fremantle, Western Australia. He completed specialist gastroenterology training at Fremantle Hospital, Royal Perth Hospital, Fiona Stanley Hospital and the Sir Charles Gairdner Hospital liver transplant unit.
He then completed an advanced interventional endoscopy fellowship at Waitematā DHB in Auckland, where he developed further expertise in complex endoscopic procedures including endoscopic ultrasound, ERCP and therapeutic endoscopy.
Before studying medicine, Dr Marius worked in cancer research in the Netherlands, Western Australia and Los Angeles. His research focused on improving outcomes for cancer patients, particularly in colorectal cancer.
Qualifications
- Fellow of the Royal Australasian College of PhysiciansFRACP, 2017
- Bachelor of Medicine / Bachelor of SurgeryUniversity of Notre Dame, Fremantle, 2009
- Master of Medical Science with DistinctionUniversity of Western Australia, 2002
- Bachelor of Science with HonoursThe Netherlands, 2001
Awards and recognition
Dr Marius has received awards for clinical care, communication, research and academic achievement.
- New Zealand Society of Gastroenterology Janssen Research Fellowship
- Research Foundation Award, Fremantle Hospital
- GP Communication Award, Fremantle Hospital
- Academic and Service Excellence Award, University of Notre Dame and RACGP Perth
- Young Investigator Awards, Sir Charles Gairdner Hospital
- VSB Scholarship for Medical Research, The Netherlands
Research background
Before becoming a doctor, Dr Marius worked in translational cancer research in the Netherlands, Western Australia and Los Angeles. His early research focused on colorectal cancer biology, molecular markers, treatment response and cancer outcomes.
A full publication list is available on request.
Education and community
Dr Marius is passionate about education for patients, GPs and the wider community. He regularly contributes to GP education and aims to make gastroenterology practical, understandable and relevant to everyday clinical care.
Outside medicine, he has also been involved in science education through the “Space Teddy” project at Forrest Hill Primary School, where children learned about science, the environment and computer programming by sending a teddy bear into near space.
He also enjoys Latin dancing and has competed successfully in zouk and salsa with his wife.