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Dr Yiannis Kallis - Harley Street

Dr Yiannis Kallis - Harley Street

Show Phone NumberThe London Clinic Consulting Rooms, 116 Harley Street, London, W1G 7JLUK
3.8 / 5  Very Good
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Opening Hours

Monday09:00 - 15:00
Tuesday18:00 - 20:00
Friday09:00 - 11:00

Popular Treatments

Gastroenterologist Consultation Up to £300
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About Dr Yiannis Kallis - Harley Street

The clinic offers expert consultation and treatment services for a full range of gastroenterological and hepatological disorders, with a particular expertise in liver diseases, complex endoscopy for gastrointestinal disorders, and the management of diseases of the pancreas and biliary tree.


Conditions treated include fatty liver, viral hepatitis, alcohol related liver damage, abnormal LFTs, liver tumours, gallstone disease, abdominal pain, and disturbances of bowel function. The clinic benefits from the latest non-invasive technologies for the assessment of GI disease, such as Fibroscan liver imaging, and can offer comprehensive gastrointestinal and liver health check services.


Our patients will benefit from a comprehensive, balanced and responsive approach to their condition and will have access to the most up to date, tailor made treatments.


The practice is set within the London Clinic, one of the leading private hospitals within the UK that offers a comprehensive range of diagnostic and therapeutic services including state of the art endoscopy and radiology. It benefits from access to a full complement of medical and surgical specialties and boasts seven day a week consultant led inpatient care and the highest level intensive care unit.


The clinic is fee insured with all major UK based insurers, and also welcomes patients who are self paying or based abroad. The London Clinic is well set-up to cater to the patients travelling from abroad for their healthcare, and can offer relevant patient advocate services to our international patients.  

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Accessible to disabled people

Public transport access

Wheelchair accessible toilet

Access without steps

Disabled parking

Patient bathroom

Wireless access

On-site pharmacy


Up to £300
Gastroenterologist Consultation

Payment Information


Private Patients Welcome



AXA PPP Healthcare



Dr Yiannis Kallis

  Hepatology,Gastroenterology,Internal Medicine,

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 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 and is at the forefront of research into developing novel endoscopic treatments for pancreato-biliary cancers.

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. He is undergraduate lead for medical education in gastroenterology and hepatology, and sits on the writing group of national guidelines in liver disease. 

Ms Karen Baxter

Job Title:
  Practice Manager
Show Phone NumberThe London Clinic Consulting Rooms, 116 Harley Street, London, W1G 7JLUK