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Dr Jason Dunn

MBBS

Gastroenterologist

25 years of experience

London, SE1 2PR

(+4 more)

53 connections in healthcare

Skill endorsed

by Dr Walter Melia, Dr. Ben Turner and 16 other professionals

4.94

/5

(52 reviews)

25 years of experience

London, SE1 2PR

(+4 more)

53 connections in healthcare

Skill endorsed

by Dr Walter Melia, Dr. Ben Turner and 16 other professionals

Areas of expertise

All
Reviews
Skill Endorsements
Colonoscopy
11
9
Gastroscopy
9
9
Barrett's Oesophagus
4
11

Contact

Book


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
(80)
Skill Endorsements
(125)

Click the bar to read reviews or skill endorsements

Colonoscopy
11
9
Gastroscopy
9
9
Barrett's Oesophagus
4
11
BRAVO Capsule
4
10
Endoscopy (OGD)
11
2
Acid Reflux (Heartburn)
12
1
Gastro-Oesophageal Reflux Disease (GORD) or Reflux
1
11
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
2
Colitis (Ulcerative Colitis)
1
Hiatus Hernia
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
GORD (Gastroesophageal Reflux Disease)
1
Colon Cancer Screening
1
Gastritis
1
Gastroenterology
1
Eosinophilic Oesophagitis
1
Colon Polyps
1
Swallowing Problems
1
Stomach / Abdominal Pain
Reflux and Colic
Pancreatitis
Helicobacter Pylori Infection
Diverticulitis
Reflux
Faecal Incontinence
Diverticular Disease
Inflammatory Bowel Disease (IBD)
Pelvic Pain
Oesophageal Cancer
Jaundice
Swollen Stomach
Pyloric Stenosis
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
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

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

Fees

  • New appointment

    £290
  • Follow-up appointment

    £180
*May vary on location

Locations

HCA Healthcare UK London Bridge Hospital

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

4.82(5253 reviews)

Opening hours

Monday
16:00 - 19:00
Tuesday
Wednesday
13:30 - 20:00
Thursday
Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
View practice profile

Opening hours

Monday
16:00 - 19:00
Tuesday
Wednesday
13:30 - 20:00
Thursday
Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
View practice profile

HCA UK at The Shard

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

4.82(4870 reviews)

Opening hours

Monday
16:00 - 19:00
Tuesday
Wednesday
13:30 - 20:00
Thursday
Friday
Saturday
Sunday

Facilities

Paid Parking
View practice profile

Welbeck

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

4.91(1377 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Paid Parking
View practice profile

London Digestion

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

4.93(45 reviews)

Opening hours

Monday
16:00 - 19:00
Tuesday
Wednesday
13:30 - 20:00
Thursday
Friday
Saturday
Sunday

Guy’s and St Thomas’ Private Healthcare

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

0.00(0 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Paid Parking
View practice profile

Areas of expertise

All
Reviews
Skill Endorsements
Colonoscopy
11
9
Gastroscopy
9
9
Barrett's Oesophagus
4
11

Contact

Book

Reviews

AI Review Summary

This summary was created by AI based on recent reviews

Dr Jason Dunn explains things clearly, and patients find him professional and friendly. He listens, guiding patients and making them feel understood and confident about their care. Procedures and treatments proceed smoothly and with little discomfort. His skill is noted for acid reflux, colonoscopy, and gastroscopy.

4.67
verified patient
02 Jun 2026

Would 100% recommend Dr Dunn, he is patient, friendly, explains things in laymen’s terms, he doesn’t rush you out the room as some other consultants do, he is a genuinely lovely man! We need more consultants like him!

5
verified patient
02 Jun 2026

Dr Jason Dunn is a world renowned expert in his area of expertise. He immediately puts you at ease and has a great bedside manner. He quickly grasps what you are trying to convey and puts in place a plan to treat your presenting problems. I wouldn’t hesitate to recommend this excellent Consultant.

Patient seen for:
4.67
verified patient
11 May 2026

Dr Dunn was courteous and clear in his explanations.

Patient seen for:
5
verified patient
28 Apr 2026

Xxxxxxxxxxxx

Patient seen for:
5
verified patient
24 Apr 2026

Dr Dunn was clear, concise, very knowledgable and skilled in his subject. He was pleasant and explained things very well. I would and have recommended him to others

5
verified patient
23 Apr 2026

I’m forever grateful to Dr Jason Dunn. He always takes time to listen thoroughly and find root cause of issues (rather than treating symptoms for a quick win). The treatments I’ve had so far have changed my life for the better. I feel at great care with Dr Dunn and will continue seeing him for as long as possible. I feel validated and understood, which is a rare find. He’s open to exploring various paths until things are figured out. Super thankful!

5
verified patient
07 Apr 2026

Dr Dunn is exceptional and I consider myself to be extremely fortunate to have been under his care.

5
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
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
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.

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Skill Endorsements

Jason is an outstanding Upper GI gastroenterologist and a leader in the field of interventional OG endoscopy, offering a range of interventions, including POEMS; I hugely value his opinions and interventions

01 Apr 2026
Endorsed for
Video Consultation
Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease

Dr Walter Melia

Dr Walter Melia

Gastroenterologist
I have referred patients to them

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

FAQ

What are Dr Jason Dunn's reviews like?

Dr Jason Dunn's overall patient rating is 4.94 out of 5 stars on Doctify. This is based on 52 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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