Jason Dunn


24 years of experience
24 years of experience



Reviewed By



Dr Jason Dunn is a Consultant Gastroenterologist based in London specialising in therapeutic endoscopy, including HALO RFA for Barrett's oesophagus.

He is the Clinical Lead for Endoscopy at Guy’s and St Thomas’ Hospitals, where he was appointed as a consultant in 2012. He has private practice priviliges at London Bridge Hospital as well.

Dr Dunn has a special interest in Barrett’s oesophagus, early Upper GI cancer and oesophageal endoscopic therapy. He is highly proficient in Endoscopic Mucosal Resection (EMR) and Radiofrequency Ablation (RFA) techniques and set up a regional Endotherapy centre at St Thomas for South East region including Kent, Surrey and Sussex. He has written guidelines for the management of Barrett’s oesophagus for London and Kent.

He was awarded a CRUK clinical fellowship at UCL and studied use of optical diagnostics and minimally invasive therapies for the treatment of Barrett’s oesophagus. He gained his PhD in 2011 and has presented his work at national and international meetings. His work on treatment of Barrett’s oesophagus with RFA, and the use of biomarkers to predict cancer progression, has won prizes. He has published in high impact factor journals and book chapters. He currently holds Honorary Senior Lecturer posts at Kings College London and Oslo University in the Institute of Medical Informatics.

Dr Dunn also has an interest in Nutrition, specialising in parenteral nutrition in oncology/palliative care and PEG tube insertion. 

Dr Dunn is the research lead for the Oesophageal Section of the British Society of Gastroenterology. He is an advisor to NICE and medical advisor to Action against Heartburn, a patient support charity. 

Diseases, Medical Tests and Treatments

HALO Radiofrequency Ablation

  • Gastroenterologist; Bowel disease including inflammatory (IBD); Crohn’s Disease; ulcerative colitis; high-quality colonoscopy; Colon polyps; Lynch Syndrome; diarrhoea; abdominal pain; indigestion; dyspepsia; constipation; irritable bowel syndrome (IBS); Reflux; Barrett’s Oesophagus; HALO Radiofrequency Ablation; Endoscopic mucosal resection; Inlet patch; globus; Eosinophilic Oesophagitis; Trans Nasal Endoscopy; general gastroenterology; nutrition


Irritable Bowel Syndrome (IBS), Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease

All procedures

  • Endoscopy (OGD)
  • BRAVO Capsule
  • Bowel Cancer Screening
  • Enteral Feeding
  • Oesophageal Stent Insertion
  • Parenteral Nutrition
  • Percutaneous Endoscopic Gastrostomy (PEG)
  • Sigmoidoscopy
  • Video Consultation

All conditions

  • Acid Reflux
  • Barrett's Oesophagus
  • Bloating
  • Constipation
  • Gastric (Stomach) Ulcers
  • Irritable Bowel Syndrome (IBS)
  • Achalasia
  • Diarrhoea
  • Gastro-Oesophageal Reflux Disease (GORD) or Reflux
  • Heart Burn
  • Coeliac Disease
  • Colitis (Ulcerative Colitis)
  • Colorectal Cancer
  • Crohn's Disease
  • Dyspepsia (Indigestion)
  • Food Intolerance
  • Functional Bowel Disease
  • Gallstones
  • Gastro-oesophageal Reflux Disease (GORD)
  • Gastrointestinal Bleeding
  • Gastroparesis
  • Hiatus Hernia
  • Inflammatory Bowel Disease (IBD)
  • Iron Deficiency Anaemia
  • Jaundice
  • LPR Reflux
  • Oesophageal Cancer
  • Oesophageal Spasm
  • Oesophagitis
  • Pelvic Pain
  • Pyloric Stenosis
  • Rectal Bleeding
  • Swollen Stomach
  • Upper Gastrointestinal Conditions (Oesophagus & Stomach)





Registered with

General Medical Council: 4738468


40 Bank Street, London, E14 5NR


27 Tooley Street, London, SE1 2PR

  • Wednesday:
    2:00 PM - 7:30 PM
  • Friday:
    9:00 AM - 12:00 PM

St Thomas Street, London, SE1 9BS

  • Wednesday:
    2:00 PM - 7:30 PM
  • Friday:
    9:00 AM - 12:00 PM

Consultation Fees

This consultant doesn't have any consultation fees information at the moment.


Overall Rating

Overall rating

Overall experience

4.92 / 5

Personal care received

4.89 / 5

Explanation of care provided

4.92 / 5



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