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Dr. Yiannis Kallis

Dr. Yiannis Kallis

Gastroenterologist ·
, London, United Kingdom

26 Years of experience ·
Languages Spoken: English

Book a video consultation with Yiannis Kallis for Gastroenterologist, from USD 645. Receive a signed report within 24 hours or a full refund if unavailable.
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Specialises in:

Liver diseases (acute and chronic)Cirrhosis and liver failureViral hepatitis (Hepatitis B, Hepatitis C)Fatty liver disease (NAFLD and NASH)Autoimmune liver diseases

About Dr. Yiannis Kallis

  • Dr. Yiannis Kallis is a Consultant Hepatologist and Gastroenterologist at the Royal London Hospital and the Royal Free Hospital, London.
  • He has expertise in a wide range of gastrointestinal diseases.
  • His special interests include liver disease and disorders of the pancreas and bile ducts.
  • He is highly skilled in diagnostic and therapeutic endoscopy.
  • He has particular expertise in ERCP (endoscopy of the bile duct and pancreatic duct).
  • Dr. Kallis is the Clinical Lead for Liver Diseases at the Royal London Hospital.
  • He also runs the North East London liver transplant network.
  • He graduated with distinction from Cambridge University.
  • He completed postgraduate speciality training at several leading London teaching hospitals.
  • He was awarded a PhD in 2010 from Imperial College London for research on liver fibrosis and regeneration.
  • His research has been published in leading peer-reviewed journals.

Conditions treated by Dr. Yiannis Kallis

  • Liver diseases (acute and chronic)
  • Cirrhosis and liver failure
  • Viral hepatitis (Hepatitis B, Hepatitis C)
  • Fatty liver disease (NAFLD and NASH)
  • Autoimmune liver diseases
  • Liver fibrosis and regeneration disorders
  • Liver cancer (Hepatocellular carcinoma)
  • Pancreatic disorders (including pancreatitis)
  • Bile duct disorders and blockages
  • Gallstones and related complications
  • Inflammatory disorders of the bile ducts

Area of Interest

  • Management of complex liver diseases (acute and chronic)
  • Disorders of the pancreas and bile ducts

Qualification

  • MA, MB BChir – Graduated with distinction from Cambridge University
  • Postgraduate speciality training at several leading London teaching hospitals
  • PhD – Imperial College London, research on liver fibrosis and regeneration (2010)

Certifications (1)

  • Fellowship of the Royal College of Physicians (FRCP)

Memberships (1)

  • British Society for Gastroenterology (BSG) – Liver Committee Member

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What to Expect in Your Consultation

Upload Your Medical Reports

Upload MRI/CT scans, laboratory reports, prescriptions, and previous medical records. Supported formats: PDF, JPEG, and DICOM.

30-Min Video Consultation

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Medical Opinion Within 24 Hours

Receive a signed medical opinion with diagnosis, treatment recommendations, and next steps in a downloadable PDF.

Care Coordination (Optional)

If needed, our team can assist with a second opinion, hospital appointments, or medical travel arrangements.

Procedures Performed

Adhesion Lysis
Capsule Endoscopy
Cardiomyotomy
Endoscopy (UGI Endoscopy)
Foregut Surgery
Hiatal Hernia Repair
Ileoanal Anastomosis (J-Pouch) Surgery
Laparoscopic Colon Resection
Laparoscopic Ventral Hernia Repair
Low Anterior Resection
Meckel's Diverticulectomy Treatment
Nissen Fundoplication
Pancreatectomy
Pancreatic Surgery
Partial Colectomy
Peroral Endoscopic Myotomy (POEM)
Proctectomy
Retroperitoneum Surgery
Robotic Hernia Surgery
Small Bowel Resection
Splenectomy
Stapled Hemorrhoidopexy
Subtotal Proctocolectomy
Total Colectomy

Frequently Asked Questions

Dr. Yiannis Kallis is available to teleconsult on the MediGence platform.

The consultation can last from 15 to 30 minutes. It may exceed the estimated time, depending on the patient’s queries and the doctor's medical suggestions.

We have Medical specialists and board-certified doctors on our panel of doctors. The consultation will be organised within 24 to 48 hours or based on the availability of the doctor and the patient.

No, the follow-up consultation fee is not included in the consultation price. The patient will be required to re-book the consultation.

The option to share your medical records is available between the steps of the form provided to you on the website.

Yes. If you are satisfied with the consultation, you can go ahead with treatment packages for your diagnosis with the help of our case managers.

Yes. The cost estimate will be provided to you by our case manager, including the doctor’s opinion, the cost estimate, and crucial information about traveling to your medical destination.

FAQ's Related to Gastroenterologist

A hepatologist is a specialist doctor who focuses on the diagnosis, treatment, and management of liver diseases, bile duct disorders, gallbladder issues, and pancreatic problems.

A gastroenterologist treats diseases of the digestive system, including the oesophagus, stomach, intestines, liver, pancreas, bile ducts, and gallbladder.

You should see a hepatologist if you have liver-related issues such as hepatitis, cirrhosis, fatty liver disease, liver cancer, abnormal liver tests, or complications related to liver function.

A gastroenterologist manages all digestive system conditions, whereas a hepatologist is a gastroenterologist with additional expertise in liver, pancreas, bile ducts, and gallbladder disorders.

ERCP (Endoscopic Retrograde Cholangiopancreatography) is a specialised endoscopic procedure used to diagnose and treat problems in the bile ducts and pancreatic ducts, such as blockages, stones, or strictures.

Yes, hepatologists trained in endoscopy can perform diagnostic and therapeutic endoscopic procedures, including ERCP, to manage bile duct and pancreatic conditions.

Some liver conditions, such as hepatitis B and C, fatty liver, and autoimmune liver disease, can be treated effectively if diagnosed early. Advanced liver disease may require transplantation.

They evaluate patients for transplant, manage them before and after surgery, and coordinate care with transplant surgeons to ensure the best outcomes.

In most cases, yes. Patients are usually referred by their GP or another specialist when specific liver or digestive issues are identified.

Common tests include liver function tests, ultrasound, MRI/CT scans, FibroScan (to check liver stiffness), liver biopsy, and endoscopic procedures like ERCP.

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