Please be aware that during the COVID-19 outbreak Dr Kallis will be undertaking face-to-face consultations if required. Video and telephone consultations are also 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 and Network Director for Hepatology across NE London integrated care service.
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 and the British Liver Transplant Group 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.
Areas of expertise
Based on patient reviews & endorsements by other professionals
All conditions and treatments
General Medical Council
Specialist's working hours
at All locations
09:00 - 15:00
17:30 - 19:30
09:00 - 12:30
17:00 - 19:00
Spoke with cate and explained everything that we needed to know, so that we could make a decision. The best money we have spent!
I d highly recommend Dr Kallis. I found him thorough over his consultaiton with willingness to explain and was offered options on what to do next. he kindly offered to follow up over email should his advice is required
Dr Kallis was very kind and informative. I would happily recommend him
Dr. Kallis very attentive and discussed my issues extensively.
Dr Kallis provided a detailed explanation and alleviated my concerns
Dr Yiannis has been amazing throughout. My family and I are grateful for his attentiveness, care, warmth and his overall manner in keeping me calm and constantly aware and in the loop in regards to my care plan with open and kind communication. I truly believe he saved my life.
Dr Kallis was honest and upfront but also really kind and supportive which is exactly what you want in a doctor.
Dr. Kallis provided my a very detailed explanation and I felt very confident about the treatment
A very diligent and pleasant doctor with excellent communication . Very happy and would recommend highly .
Dr Yiannis explained the results with much details and made few suggestion about next steps
Have you worked with this specialist?
Excellent, highly regarded colleague and my go-to GI/Liver Specialist. Highly recommended!
Dr. Christos Tziotzios
Dr Kallis is an excellent physician. He is my to go to when it comes to ERCP and complex liver issues.
Dr Ahmed Albusoda
Dr Kallis has worked collaboratively with me for many years, and is an excellent clinical colleague. I consider his opinion to be extremely thorough, accurate and professional, and he is held in high esteem by all specialists in our area.
Mr Charles Imber
Dr Kallis is a highly experienced gastroenterologist who I refer all my patients with GI symptoms to. He gets consistently stellar feedback from all that see him including close friends and family members. Specific feedback from patients is how relaxed they feel when consulting with him.
Dr Ravi Assomull
What are Dr Yiannis Kallis's reviews like?
Dr Yiannis Kallis's overall patient rating is 4.94 out of 5 stars on Doctify. This is based on 235 reviews
What languages does Dr Yiannis Kallis speak?
Dr Yiannis Kallis speaks English
Where is Dr Yiannis Kallis located?
Dr Yiannis Kallis primarily practices at The London Clinic, located at 20 Devonshire Place, London, United Kingdom, W1B 6BW
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What are Dr Yiannis Kallis working hours?
Dr Yiannis Kallis is working Monday (09:00 - 15:00), , , Thursday (17:30 - 19:30), Friday (09:00 - 12:30, 17:00 - 19:00), ,
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Does Dr Yiannis Kallis accept new patients?
Dr Yiannis Kallis generally accepts new patients.
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