Practices worked at
Please be aware that during the COVID-19 Outbreak Dr Kallis will not be undertaking any face-to-face consultations. Telephone consultations are available, please contact for further information.
Dr Yiannis Kallis is a Consultant Hepatologist and Gastroenterologist at the Royal London Hospital (Barts Health NHS Trust) and the Royal Free Hospital London, two of the UK's leading teaching hospitals, where his practice covers a broad range of gastro-intestinal diseases. He specialises in liver disease and disorders of the pancreas and bile ducts, and runs the NE London outreach liver transplant network. He is Clinical Lead for Hepatology at the Royal London Hospital.
He is a highly skilled in diagnostic and therapeutic endoscopy and colonoscopy, with a particular expertise in complex ERCP (endoscopy of the bile duct and pancreatic duct). He is clinical lead for ERCP services at Bart Health for the HPB cancer board. He is at the forefront of research into developing novel endoscopic treatments for pancreato-biliary cancers, and is a specialist advisor to the National Institute of Health and Care Excellence (NICE) in this field. He serves on the British Society for Gastroenterology (BSG) liver committee.
He graduated from Cambridge University with Distinction and undertook postgraduate specialty training across several leading London teaching hospitals. He was awarded a PhD in 2010 for his research into liver fibrosis, stem cells and regeneration at Imperial College London and Cancer Research UK, and publishes his work in high impact peer-reviewed journals.
He is currently an Honorary Clinical Senior Lecturer at Barts and the London School of Medicine and Dentistry, QMUL, where he is a principal investigator on several multi centre clinical trials in treatments for advanced liver disease and for inflammatory disorders of bile ducts. He regularly lectures in gastroenterology and hepatology and supervises MSc student projects in liver disease at QMUL. He sits on the writing group for national guidelines in liver disease.
- Therapeutic endoscopy
- Portal Hypertension
- Abnormal LFTs (liver function tests)
- Alcohol related liver and GI disorders
- Fatty liver disease
- Abdominal Pain
- Viral hepatitis
- Liver disease
- Pancreas, bile duct and gallbladder diseases
- Liver Cancer
- Liver transplantation
- Trinity College Cambridge, MA(Hons) MB BChir
- Royal College of Physicians London, FRCP
- Imperial College London, PhD
- Member of the British Society of Gastroenterology, the British Association for the Study of the Liver, and the European Association for the Study of the Liver
Dr. Kallis has a very friendly bedside manner, and also gave thorough explanation.
Very nice manner, reassuring and informative.
Great - very nice guy who took the time to understand the symptoms and provide detailed advice.
Very relaxed consultation. Was made to feel at ease. All information was clear and concise. Very happy with my appointment.
Very clear and competent
Very polite and informative. In and out quickly
All very clear
Fantastic, careful, professional,clear and simple explanations. Took time to go through things.
Very clear explanations of the situation. Does not push to over costly examinations. Great experience overall.
Dr Kallis was very clear and thorough, I felt well looked after and ease regarding what was happening and what to expect next.
Great patient manner, clearly explained everything, listened to and answered all my questions.
Wonderful experience honest advice .Thank you so much.
He is so nice, kind, caring and professional. He reassured me and went the extra mile
Friendly, good experience
Very thorough and takes time to explain results
Dr Kallis is compassionate reassuring and could not be kinder he has sorted me out and I can in all honesty say I feel rather sad I will not be seeing him again
Great. Explained everything clearly
Very efficient examination with no discomfort and immediate knowledge of result
Excellent, very thorough investigation and explained everything clearly.
Very positive clear information well communicated
Helpful and pleasant. Thorough but knew when to pass on for issues outside expertise. Gave confidence and willing to explain.
Excellent throughout. Very helpful in explaining all procedures, results, and next steps. Will recommend.
Very easy to talk with, addressed all of my concerns, happy to explain everything in detail.
Very friendly, professional and informative, thank you.
Very professional and explained very well
He has explained everything I need in depth and I am feeling very satisfied with his consultation.
Saw me at short notice. Happy with review.
Everything seemed extremely thorough and very well explained in layman’s terms for me. All my questions were kindly and clearly answered.
Good made easy to understand.
Good advice, clear
Very professional and friendly.
Dr Kallis was extremely nice and clearly very knowledgable
Great and very clear explanation
Such a relief to find someone who was willing to listen and who could explain so clearly and carefully what was going on with me and what the likely implications and options are. And he did the report the same day so I could go back to my GP. Thank you so much Dr Kallis
Excellent very clear
Very good, thorough
Outstanding, really personable and patient-centric
Dr Kallis is an exceptional clinician, and a valuable colleague and opinion. Patients I have referred to him have been delighted. I would trust him to treat my family.
Dr Kallis is an excellent physician and liver/HPB specialist. I recommend him highly
Dr Kallis, is a hugely experienced and dedicated physician who is always empathic and patient focussed – I would recommend him without hesitation
An excellent opinion and continue to work together. Would recommend.