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The London Clinic


  • Gastroenterology
  • Hepatology
  • Liver Diseases

Sub specialties

  • Liver Disease
  • Pancreatic disease
  • Gallbladder and Bile Duct disease
  • Endoscopy
  • Liver Cancer

Clinical interests

  • Liver health and FibroScan
  • Fatty Liver
  • Abnormal LFTs

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.

Personal profile

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

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Part of

Dr Kallis is a member of the London Liver Group



Health Show (Ramadan Special)
Dr Kallis talks about the symptoms and treatment of stomach (peptic) ulcers on Sky’s Islam Channel.

Watch Dr Kallis's interview


Here’s what a weekend bender does to your body
Dr Kallis explains some of the effects of a weekend's drinking to Metro.

Metro October 2017

Fizz-Free February
Alcohol-free challenges are now hugely popular, but do they offer lasting benefits? Dr Kallis explains.

Good Housekeeping February 2018

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
  • Cambridge
    1993 - 1998
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Clinic location

116 Harley Street
London W1G 7JL
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Clinic times

Monday: 9.30am - 3pm
Friday: 9am - 12pm


Karen Baxter and Jeanette Brindley
020 7616 7617

Appointment enquiries: +44 (0) 20 3944 1073 Concierge service: +44 (0) 203 219 3323 Self-Pay service: +44 (0) 203 918 7301International office: +44 (0) 203 219 3266 Invoice and payment enquiries: +44 (0) 207 616 7708 General enquiries: +44 (0) 20 3918 9135

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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