Dr Yiannis Kallis

Consultant Gastroenterologist & Hepatologist


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 hospital. His practice covers a broad range of gastro-intestinal diseases and specialises in liver disease and disorders of the pancreas and bile ducts. He is Clinical Lead for Hepatology at the Royal London Hospital and runs the NE London outreach liver transplant network.

Special Interests

  • Abdominal pain
  • Endoscopy
  • Liver diseases/disorders
  • Viral hepatitis
  • Fatty liver
  • Alcohol related health problems
  • Abnormal LFTs
  • Liver health checks
  • Gallstones
  • Bile duct diseases
  • Pancreas diseases
  • Gallbladder diseases
  • Change in bowel habit

Dr Yiannis Kallis works at the following clinics

Canary Wharf

0207 132 1440

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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 stem cells and publishes his work in high impact peer-reviewed journals. He is currently an Honorary Senior Lecturer at Barts and the London School of Medicine and Dentistry where he is the principal investigator of several national and international clinical trials in treatments for liver and bile duct diseases. He sits on the writing group for national guidelines in liver disease, and is a specialist advisor to the National Institute of Health and Care Excellence (NICE).

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) and serves on the British Society for Gastroenterology (BSG) liver committee.

As a doctor, he has a lifelong commitment to clinical excellence, striving to provide individualised, compassionate patient-centred care founded on the best available up to date medical evidence

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