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Dr Jason Dunn

MBBS

Gastroenterologist

25 years of experience

London, SE1 2PR

(+4 more)

42 connections in healthcare

Skill endorsed

by Dr. Ben Turner, Dr Vishal Saxena and 15 other professionals

4.95

/5

(45 reviews)

25 years of experience

London, SE1 2PR

(+4 more)

42 connections in healthcare

Skill endorsed

by Dr. Ben Turner, Dr Vishal Saxena and 15 other professionals

Areas of expertise

All
Reviews
Endorsements
Colonoscopy
10
9
Gastroscopy
5
9
Barrett's Oesophagus
2
11

Contact

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Expert in:

About Dr Jason Dunn

Dr Jason Dunn, Consultant Gastroenterologist, is based in London working within the Guy's and St Thomas' Hospitals and privately within the London Bridge Hospital and One Welbeck. He is highly specialised in Oesophageal diseases including GERD, LPR, EoE, Achalasia and Barrett's oesophagus. He is one of few specialists in the UK that practice therapeutic endoscopy in the oesophagus, including POEM for acahalsia, Esoflip/Endoflip,  HALO Radiofrequency Ablation (RFA) (for Barrett's oesophagus and also inlet patch) and Endoscopic Mucosal Resection (EMR) throughout the GI tract for polyps and early cancer.

Other skills include general gastroenterology, nutrition (including PEG tube insertion), Irritable Bowel Syndrome, Colonic polyps, weight loss and SIBO. 

Dr Dunn has an extensive research interest with over 200 research publications in high-impact medical journals and several book chapters, with 1850 citations. He was awarded the CRUK clinical fellowship at UCL examining the use of optical diagnostics and minimally invasive therapies for the treatment of Barrett's oesophagus. He was later awarded a PhD for this work. His continued work in the field of Barrett's oesophagus, and biomarkers to predict cancer progression has won him several awards. He continues to contribute back to medical education by holding the position of Honorary Senior Lecturer at Kings College London and previously at Oslo University.

Dr Dunn has had a very successful career in which he has established a regional Endo-therapy centre at St Thomas for the South East region, written guidelines for the management of Barrett's oesophagus, and been Clinical Lead for Endoscopy at Guy's and St Thomas' Hospitals. Additionally, he was the Research Lead for the Oesophageal Section of the British Society of Gastroenterology and remians on this committee. He is the medical advisor to the charity- Action against Heartburn.


Subspecialties

  • Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease
  • Neuro-Gastroenterology
  • Irritable Bowel Syndrome (IBS)

Areas of expertise

All
Reviews
(66)
Endorsements
(124)

Click the bar to read reviews or skill endorsements

Colonoscopy
10
9
Gastroscopy
5
9
Barrett's Oesophagus
2
11
Acid Reflux (Heartburn)
11
1
Gastro-Oesophageal Reflux Disease (GORD) or Reflux
1
11
BRAVO Capsule
2
10
Endoscopy (OGD)
9
2
Bloating
2
8
Achalasia
2
8
Oesophagitis
9
Sigmoidoscopy
8
Rectal Bleeding
8
LPR Reflux
8
Upper Gastrointestinal Conditions (Oesophagus & Stomach)
5
Irritable Bowel Syndrome (IBS)
3
1
Bowel Cancer Screening
2
2
Iron Deficiency Anaemia
4
Constipation
3
Gastric (Stomach) Ulcers
3
Diarrhoea
3
Video Consultation
1
Colitis (Ulcerative Colitis)
1
Gastroenteritis
1
Heart Burn
1
Soft Tissue Injection
1
Mallet Toe Correction
1
Laminectomy
1
Swallowing Disorder (Dysphagia)
1
Parenteral Nutrition
1
Dyspepsia (Indigestion)
1
Mini Gastric Bypass
1
Standard Blood Screen
1
GORD (Gastroesophageal Reflux Disease)
1
SmartGraft FUE Hair Transplant Surgery
1
Colon Cancer Screening
1
Gastritis
1
Gastroenterology
1
Colon Polyps
1
Swallowing Problems
1
Stomach / Abdominal Pain
Reflux and Colic
Pancreatitis
Helicobacter Pylori Infection
Diverticulitis
Reflux
Faecal Incontinence
Diverticular Disease
Pelvic Pain
Oesophageal Cancer
Jaundice
Swollen Stomach
Pyloric Stenosis
Inflammatory Bowel Disease (IBD)
Hiatus Hernia
Gastroparesis
Gastro-oesophageal Reflux Disease (GORD)
Functional Bowel Disease
Coeliac Disease
Enteroscopy
Stool Testing
Weight Loss
Gastrostomy-Jejunostomy Tube Insertion
Stomach (Gastric) Cancer
Enteral Feeding
Small Intestinal Bacterial Overgrowth (SIBO)
Nausea and Vomiting
Oesophageal Spasm
Microscopic Colitis
Percutaneous Endoscopic Gastrostomy (PEG)
Haemorrhoids
Gut Microbiome
Oesophageal Stent Insertion
Gut Health
Gluten Intolerance
Gastrointestinal Bleeding
Pyloric Dilatation
Gallstones
Liver Function Tests
Gallbladder Disease
Lactulose Hydrogen Breath Test
Functional Gut
Helicobacter Pylori Breath Test
Food Intolerance
Gallbladder Disease (Medical Management)
Crohn's Disease
Eosinophilic Oesophagitis
Colorectal Cancer
Endoscopic Laser Treatment
Autoimmune Diseases

Registered with

General Medical Council

No. 4738468


Education

King's College London, University of London

Medicine

Graduated 2000

University College London, University of London

Barrett's oesophagus

Graduated 2010


Languages spoken

  • English

Consultation fees

  • New appointment: £275
  • Follow-up appointment: £175

Insurers

  • Bupa Fee Assured
  • AXA Health
  • Bupa
  • Cigna
  • Aviva Health
  • The Exeter
  • WPA
  • Allianz Worldwide Care
  • Vitality
  • Healix Health Services
  • National Friendly
  • Freedom Health Insurance
  • General and Medical
  • Benenden Health

Location

All locations for Dr Jason Dunn

HCA Healthcare UK London Bridge Hospital

4.82

(5109)

27 Tooley Street, London, United Kingdom, SE1 2PR

4.81

(4663)

St Thomas Street, London, United Kingdom, SE1 9BS

4.9

(1242)

1 Welbeck St, Marylebone, London, London, United Kingdom, W1G 0AR

4.96

(26)

Suite 301 Emblem House, 27 Tooley Street, London, United Kingdom, SE1 2PR

0

(0)

St Thomas Hospital, Westminster Bridge Road, London, United Kingdom, SE1 7EH

Reviews

AI Review Summary

This summary was created by AI based on recent reviews

Dr Jason Dunn demonstrates a professional approach and provides clear explanations during patient interactions. Patients praise his clear explanations of diagnoses and treatment options, along with his attentive listening skills; procedures are described as smooth and comfortable. Some patients mention not recalling speaking with him following certain procedures. His expertise is valued in treating conditions such as Acid Reflux and in performing investigations like Colonoscopy and Endoscopy.

5.0
verified patient
15 Mar 2026

Extremely grateful for the care I received under Dr Dunn who was at all times friendly, professional and patient. He took time to clearly explain my condition and treatment and answer any questions. He listened carefully to any concerns I had before my procedure which put me at ease. I would highly recommend Dr Dunn to others seeking treatment.

5.0
verified patient
12 Mar 2026

I recently underwent a colonoscopy with Mr Jason Dunn and I could not be more grateful for the exceptional care I received by him. The procedure itself went smoothly, and I experienced far less discomfort than I expected. I can’t recommend Mr Dunn highly enough.

5.0
verified patient
12 Mar 2026

Dr Jason Dunn is very warm and very professional. He is a very good listener and takes time to explain everything to you. I would recommend him very highly.

5.0
verified patient
12 Mar 2026

Dr Dunn was very thorough & explained everything very clearly. He was approachable & friendly, whilst maintaining a professional attitude

Patient seen for:
5.0
verified patient
03 Feb 2026

Dr Dunn was very patient. Answered all my questions and did a thorough examination. Very reassuring. I’m happy to see some improvement of my digestive issues.

5.0
verified patient
27 Jan 2026

Mr Dunn is always ery welcoming, explains things very clearly and answers all my question.

Patient seen for:
5.0
verified patient
09 Dec 2025

Great first meeting, clear and precise explanation of my issues.

Patient seen for:
5.0
verified patient
05 Dec 2025

Calm, clear, friendly. Happy to explain and describe what has happened and what should happen next.

4.7
verified patient
05 Dec 2025

Extremely affable and patient focussed. Presented as having great knowledge and listening skills

Patient seen for:
5.0
verified patient
27 Nov 2025

I’ve seen Dr Jason Dunn a few times throughout the years! I always appreciate that no matter how small the matter was or how repetitive I was, he always listened attentively and demonstrated high standard of professionalism by explaining and answering my every question.

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Endorsements

Jason gives the highest standard of care for his patients and is excellent doctor

07 Nov 2024
Endorsed for
Irritable Bowel Syndrome (IBS)
Bowel Cancer Screening

Dr. Ben Turner

Dr. Ben Turner

Neurologist
I have looked after their patients

Highly skilled and experienced Gastroenterologist. Great bedside manner - highly recommended!

13 May 2024
Endorsed for
Bowel Cancer Screening
Irritable Bowel Syndrome (IBS)

Dr Vishal Saxena

Dr Vishal Saxena

Gastroenterologist
Is a colleague

I refer patients to Jason for complex oeophageal conditions, and have been impressed by the quality of his care and by patient feedback.

24 Jan 2024
Endorsed for
Barrett's Oesophagus
GORD (Gastroesophageal Reflux Disease)

Dr John O'Donohue

Dr John O'Donohue

Gastroenterologist
I have referred patients to them

Dr Dunn is an excellent all round Gastroenterologist with expertise in disorders of the oesophagus including management of Barrett’s, radiofrequency ablation and endoscopic mucosal resection

28 Sep 2020
Endorsed for
Gastroenterology
Standard Blood Screen
Mini Gastric Bypass

DR

Dr Rim El Rifai

Paediatrician
Is a colleague

FAQ

What are Dr Jason Dunn's reviews like?

Dr Jason Dunn's overall patient rating is 4.95 out of 5 stars on Doctify. This is based on 45 reviews.

What languages does Dr Jason Dunn speak?

Dr Jason Dunn speaks English

Where is Dr Jason Dunn located?

Dr Jason Dunn primarily practices at HCA Healthcare UK London Bridge Hospital, located at 27 Tooley Street, London, United Kingdom, SE1 2PR
See more locations

What are Dr Jason Dunn working hours?

Dr Jason Dunn is working Monday (16:00 - 19:00, 16:00 - 19:00, 16:00 - 19:00), Wednesday (13:30 - 20:00, 13:30 - 20:00, 13:30 - 20:00)

Find where Dr Jason Dunn operates today

Does Dr Jason Dunn accept new patients?

Dr Jason Dunn generally accepts new patients.

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