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General enquiries:
+44 (0)207 935 4444
Book an appointment:
+44 (0)207 616 7693
Self-pay enquiry:
+44 (0)203 219 3315
The London Clinic
Dr Yiannis Kallis is a Consultant Hepatologist and Gastroenterologist specialising in liver, pancreas and bile ducts disease. He performs the FibroScan test, and endoscopy.

Make an appointment

Fast track your treatment with Dr Yiannis Kallis. Call us on 020 3944 1073.

Book appointment now

Your call may be recorded for training and monitoring purposes.

Specialties and sub-specialties

Liver Diseases
Liver Disease
Pancreatic disease
Gallbladder and Bile Duct disease
Liver Cancer

Specialist microsite

London Liver Group

Further information

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Dr Kallis is a member of the London Liver Group

Professional profile

Dr Yiannis Kallis is a Consultant Hepatologist and Gastroenterologist at the Royal London Hospital and the Royal Free Hospital London, two of the UK's leading teaching hospitals.

His practice covers a broad range of gastro-intestinal diseases with a particular emphasis on liver disease and disorders of the pancreas and bile ducts.

Dr Kallis is a highly skilled diagnostic and therapeutic endoscopist, with a particular expertise in ERCP (endoscopy of the bile duct and pancreatic duct). He is Clinical Lead for Liver Diseases at the Royal London Hospital and runs the NE London liver transplant network.

Dr Kallis 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 and regeneration at Imperial College London and has published his work in high impact peer-reviewed journals.

Dr Kallis is currently an Honorary Clinical Senior Lecturer at Barts and the London School of Medicine and Dentistry, 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 is actively involved in teaching and helps to run Masters and Specialty Certificate Examination courses in gastroenterology.

He sits on the writing group for national guidelines in liver disease, is a specialist advisor to the National Institute of Health and Care Excellence (NICE), and serves on the British Society for Gastroenterology (BSG) liver committee.

Clinical interests

  • Liver health and FibroScan
  • Fatty Liver
  • Abnormal LFTs

Current posts

  • Consultant Hepatologist and Gastroenterologist
    Barts Health NHS Trust (Royal London Hospital)
  • Honorary Clinical Senior Lecturer
    Barts and the London School of Medicine and Dentistry
  • Honorary Consultant Hepatologist
    Royal Free London NHS Foundation Trust

Medical training

Year qualified 1998
  • Cambridge 1993 - 1998


Here’s what a weekend bender does to your body
Dr Kallis explains some of the effects of a weekend's drinking to Metro.
Fizz-Free February
Alcohol-free challenges are now hugely popular, but do they offer lasting benefits? Dr Kallis explains.

Personal interests

Dr Kallis enjoys cycling, football, chess and spending time with his young family.


A nurse with a patient

Facilitating acute admissions into The London Clinic whilst maintaining the highest levels of safety and care, supported by a consultant on-call rota.

Concierge service

Chauffeur loading suitcases into a luxury car

We can support our patients with travel, hotel accommodation, London tours, plus theatre and restaurant reservations.

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Main numbers

Concierge service: +44 (0) 203 219 3323 International office: +44 (0) 203 219 3266 Invoice and payment enquiries: +44 (0) 207 616 7708 

Your call may be recorded for training and monitoring purposes.

Medical service numbers

Breast services appointments: +44 (0) 207 616 7653 Diagnostics appointments: +44 (0) 207 616 7653 Endoscopy appointments: +44 (0) 207 616 7760 Eye centre appointments: +44 (0) 207 616 7768 Haematology appointments: +44 (0) 207 535 5503 Kidney services appointments: +44 (0) 207 224 5234 Liver services appointments: +44 (0) 207 616 7719 Physiotherapy appointments: +44 (0) 207 616 7651 Radiology appointments: +44 (0) 207 616 7653

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