Doctify logo
For providers
Provider Login

Dr Michael Mendall

MA, MD, FRCP

Gastroenterologist

Live bookings available

41 years of experience

London, W1U 5HJ

(+7 more)

29 connections in healthcare

Skill endorsed

by Professor Richard Pollok, Dr Stephan Brincat and 5 other professionals

4.9

/5

(35 reviews)

Live bookings available

41 years of experience

London, W1U 5HJ

(+7 more)

29 connections in healthcare

Skill endorsed

by Professor Richard Pollok, Dr Stephan Brincat and 5 other professionals

Areas of expertise

All
Reviews
Skill Endorsements
Colonoscopy
10
1
Gastroscopy
6
Heartburn (Acid Reflux)
5

Contact

Book online


Expert in:

About Dr Michael Mendall

Dr Michael Mendall is a highly experienced Consultant Gastroenterologist and General Physician, recognised internationally both for his clinical expertise in digestive and liver disorders and for his influential research on the links between the gut, infection, inflammation and broader health. He is known for combining meticulous clinical assessment with a calm, clear and approachable manner, helping patients feel informed and involved at every step.

Clinically, Dr Mendall manages the full range of gastrointestinal conditions, including abdominal pain, acid reflux and heartburn, indigestion, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD – Crohn’s disease and ulcerative colitis), coeliac disease, gastrointestinal bleeding, unexplained weight loss, diarrhoea and constipation, bloating, and problems related to diet, food intolerance and the gut microbiome. He also has extensive experience in liver disease, abnormal liver tests, fatty liver, and alcohol‑related issues, as well as general medical problems that overlap with gut health, such as fatigue and weight change.

An expert endoscopist, Dr Mendall routinely performs diagnostic and therapeutic upper GI endoscopy (gastroscopy) and colonoscopy. He is skilled in detecting and removing polyps, investigating anaemia and bleeding, and screening for bowel cancer. He places a strong emphasis on safety, comfort and clear post‑procedure explanations, ensuring patients understand their results and options on the same day whenever possible.

Dr Mendall qualified in medicine from the University of Cambridge and completed his specialist training in gastroenterology and general internal medicine at leading London teaching hospitals. Early in his career he developed a particular interest in how infection, inflammation and lifestyle factors influence digestive disease and heart disease. This led to a higher research degree and a sustained academic career that has made a lasting contribution to gastroenterology.

He has published extensively in peer‑reviewed journals, authored book chapters and lectured nationally and internationally. His research has been at the forefront of understanding Helicobacter pylori infection and dyspepsia, the mechanisms underlying IBS, and the complex links between the gut, immunity, metabolism and cardiovascular disease. This work has helped shape modern thinking about how gut health affects the whole body, and continues to inform clinical guidelines and everyday practice in the UK and abroad.

This strong academic background directly underpins his patient care. Dr Mendall keeps fully up to date with emerging evidence and new treatments, and is committed to offering therapies that are scientifically grounded rather than fashionable but unproven. Patients benefit from an approach that is both innovative and cautious: he is ready to use new techniques or medications when the data are robust, but avoids unnecessary tests and interventions where they are unlikely to add value.

Patients value Dr Mendall’s thoughtful, holistic style. He takes time to listen carefully to symptoms and concerns, reviews previous tests and treatments in detail, and explains the pros and cons of each investigation and management option in clear, straightforward language. In clinic, he works closely with dietitians, surgeons, radiologists and other specialists to provide comprehensive, joined‑up care, and ensures prompt communication with GPs and other clinicians.

Dr Mendall welcomes both insured and self‑funding patients, offers timely appointments, and understands the importance of rapid diagnosis and clear, evidence‑based advice, particularly when symptoms are worrying or life is busy.


Subspecialties

  • Hepatology
  • Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease
  • Irritable Bowel Syndrome (IBS)
  • Pancreaticobiliary Medicine (Bile Ducts & Pancreas)
  • Neuro-Gastroenterology

Areas of expertise

All
Reviews
(51)
Skill Endorsements
(17)

Click the bar to read reviews or skill endorsements

Colonoscopy
10
1
Gastroscopy
6
Heartburn (Acid Reflux)
5
Colitis (Ulcerative Colitis)
4
1
Endoscopy (OGD)
4
1
Bloating
3
Sigmoidoscopy
3
Gallstones
2
1
Dyspepsia (Indigestion)
2
1
Stomach / Abdominal Pain
2
Gastro-Oesophageal Reflux Disease (GORD)
2
Fatty Liver Disease
1
1
Routine Eye Exam
1
Coeliac Disease
1
Hiatus Hernia
1
Gastroparesis
1
Jaundice
1
Nausea and Vomiting
1
Mast Cell Activation Syndrome (MCAS)
1
ERCP Procedure
2
Irritable Bowel Syndrome (IBS)
2
Oesophageal Stent Insertion
1
Small Bowel Capsule Endoscopy
1
Upper Gastrointestinal Conditions (Oesophagus & Stomach)
1
Gastric (Stomach) Ulcers
1
Enteral Feeding
1
Crohn's Disease
1
Weight Loss
Blood in Stool / Rectal Bleeding (Haematochezia)
Portal Hypertension
Pancreatic Disorders
Liver Disease
Gastroenterology
Gastritis
Gallbladder Disease
Cirrhosis
Autoimmune Hepatitis
Alcohol-Related Liver Disease
Alcohol Related Liver Problems
Constipation
Wilson's Disease
Swollen Stomach
Pyloric Stenosis
Primary Sclerosing Cholangitis (PSC)
Primary Billiary Cholangitis (PBC)
Pancreatitis
Oesophagitis
Oesophageal Spasm
Inflammatory Bowel Disease (IBD)
Hepatitis
Haemochromatosis
Functional Bowel Disease
Barrett's Oesophagus
Liver Screening (Risk Stratification)
Achalasia
Liver Function Tests
Liver Biopsy
Food Intolerance
Percutaneous Endoscopic Gastrostomy (PEG)
Reflux and Colic
Swallowing Problems
Small Intestinal Bacterial Overgrowth (SIBO)
Bowel Cancer Screening
Helicobacter Pylori Infection
BRAVO Capsule
Gluten Intolerance
Diarrhoea
FibroScan
Helicobacter Pylori Breath Test
Diverticular Disease
Video Consultation
Balloon Dilatation
Diverticulitis

Registered with

General Medical Council

No. 3095726


Education

University of London

Medicine

Graduated 1985

University of Cambridge

Medicine

Graduated 1982


Qualifications

Education:

  • Cambridge University - MA
  • London University - MBBS
  • University of London - MD

Memberships:

  • Royal College of Physicians
  • American Gastroenterology Association
  • British Society of Gastroenterology

Languages spoken

  • English

Insurers

  • Aetna
  • Freedom Health Insurance
  • Healix Health Services
  • Saga Health Insurance
  • Bupa
  • Cigna
  • General and Medical
  • The Exeter
  • Simply Health (Dental)
  • Aviva Health
  • WPA
  • Vitality
  • Bupa Fee Assured
  • Allianz Worldwide Care
  • AXA Health
  • Bupa Global

Fees

  • New appointment

    £250
  • Follow-up appointment

    £150
*May vary on location

Locations

HCA UK City of London - 120 Old Broad Street

120 Old Broad Street, London, United Kingdom, EC2N 1AR

4.89(63 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Opening hours

Monday - Friday
Saturday
Sunday

HCA UK at The Shard

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

4.82(5,183 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Paid Parking
View practice profile

Spire St Anthony's Hospital

London Road, North Cheam, Sutton, United Kingdom, SM3 9DW

4.88(1,273 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Free Parking
View practice profile

HCA UK Canary Wharf

40 Bank Street, London, United Kingdom, E14 5NR

4.97(117 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

North Downs Hospital

46 Tupwood Lane Caterham, Surrey, United Kingdom, CR3 6DP

4.89(392 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Free Parking
View practice profile

HCA Healthcare UK London Bridge Hospital

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

4.83(5,466 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
View practice profile

The Shirley Oaks Hospital (part of Circle Health Group)

Poppy Lane Shirley Oaks Village, Croydon, United Kingdom, CR9 8AB

4.88(1,221 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Free Parking
View practice profile

London Medical

49 Marylebone High Street, London, United Kingdom, W1U 5HJ

4.85(2,151 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Paid Parking
View practice profile

Areas of expertise

All
Reviews
Skill Endorsements
Colonoscopy
10
1
Gastroscopy
6
Heartburn (Acid Reflux)
5

Contact

Book online

Reviews

AI Review Summary

This summary was created by AI based on recent reviews

Dr Michael Mendall is regarded as professional, thorough, and caring. Patients commend his expertise in managing conditions like Ulcerative Colitis, with many achieving remission and avoiding surgery, and he provides clear explanations for investigations and procedures. His commitment to finding effective solutions and attention to detail helps patients feel safe and confident, leading to improved health and quality of life. Patient feedback frequently highlights effective management of heartburn or acid reflux, and various types of colonoscopy.

5
verified patient
06 Oct 2026

Dr Mendall was incredibly helpful and knowledgeable and helped me get to the root cause of issues I've been dealing with for over 20 years but kept being dismissed by other doctors. I'm very grateful I chose him as my doctor and wish I'd found him sooner.

2.33
verified patient
25 Sep 2026

I felt I was only talking. I expected root cause analysis discussion and it was not satisfactory to my expectations.

Patient seen for:
Reply from Michael Mendall
27 Sep 2026
avatar-image

Thank you for your feedback. I’m sorry that the consultation did not meet your expectations. Bloating can have a number of possible causes, and my approach is to take a detailed history and use this to determine which explanations and investigations are most relevant. I am sorry if I did not make that process, or my conclusions, sufficiently clear during our consultation. I appreciate you taking the time to provide feedback.

5
verified patient
27 Aug 2026

I was referred to Dr Mendall by a work colleague as I had been struggling with some health issues. From my initial consultation, Dr Mendall was attentive and extremely helpful. He listened to my concerns and took them seriously. He explained things clearly and was very thorough without making me feel dismissed. I felt supported from my initial consultant through the investigations and finally test results. I would highly recommend Dr Mendall to anyone looking for a caring, thorough and attentive doctor. I

Patient seen for:
5
verified patient
27 Aug 2026

Mr Mendall He is thorough in his investigations, very pleasant, professional and communicates and explains everything well. He truly wants the best outcome for his patients . He also has a wonderful PA , who provides you with copies of letters in a very timely way. I am still on my journey with him and am hopeful that my ongoing treatments work. I do have the assurance though that i am able to contact Mr Mendall in between appointments if i have to .

5
verified patient
30 Jul 2026

We discussed my symptoms and Dr Mendall checked me over. we then made a plan and the necessary investigations were organised.

5
verified patient
12 Jun 2026

Dr Mendall has been looking after me since 2022. What initially began as distal proctitis progressed into a severe flare of Ulcerative Colitis in 2023, which led to my hospital admission and the very real prospect of a colectomy. At the time, I was in an extremely difficult condition, experiencing severe symptoms and with a CRP level over 200, while understandably feeling very anxious about the possibility of having my colon removed. Throughout this period, Dr Mendall’s responsiveness, care, and attention were exceptional. Thanks to his expertise and decisive management, my condition was stabilised without the need for surgery, and under his care I was able to achieve full remission. I always felt genuinely cared for and reassured, and he consistently made the time to ensure I was receiving the best possible treatment. His knowledge and experience in his field are truly evident, and I will always be incredibly grateful for the care he has provided. To this day, Dr Mendall continues to look after me with the same level of responsiveness and dedication. On several occasions, when I have been concerned about my condition, he has gone out of his way to see me the very same day, which has been incredibly reassuring.

5
verified patient
28 May 2026

Dr Mendall is an extremely thorough, professional and approachable consultant. He was able to see me at short notice, reviewed my results quickly and thoroughly, and explained everything at each stage of my treatment. I had some worrying and unusual test results and at a difficult time, was put at ease. I am now recovering well post-surgery and so relieved. Thank you very much Dr Mendall for looking after me.

5
verified patient
30 Oct 2025

Dr. Mendall is an exceptionally thorough and professional doctor. Even when my worsening condition repeatedly led to dead ends, he never gave up. Instead, he persevered, exploring every possible medical option until we finally found one that worked—something that has fundamentally changed my life. Before his care, I was so unwell that I could barely function day to day, living in constant, debilitating pain. Thanks to Dr. Mendall’s dedication and persistence, my quality of life has improved dramatically—I can now live and function like a human being again. Having spent many years under the care of doctors who were unwilling to go the extra mile, I can confidently say that Dr. Mendall is entirely different. His commitment to his patients and his determination to find solutions set him apart, and I am profoundly grateful for the care and support I received from him.

Reply from Michael Mendall
03 Nov 2025
avatar-image

Thank you your appreciation is appreciated!

5
verified patient
24 Jul 2025

Dr Mendall has looked after me for a number of years and he has always treated me with great courtesy, understanding and compassion. He is without doubt an exemplary professional with vast knowledge and expertise. I always feel safe and secure in his hands. I trust him implicitly. He is an outstanding doctor with a wonderful bedside manner. Thank you Dr. Mendall.

Patient seen for:
Reply from Michael Mendall
28 Jul 2025
avatar-image

Thank you Ann. It has been a pleasure looking after you and knowing you

5
verified patient
29 Apr 2025

Very friendly and professional service from Dr. Mendall.

Patient seen for:
Your trust is our top concern, so providers can't pay to alter or remove reviews.
Learn more here

Skill Endorsements

Senior figure in gastroenterology with a great deal of clinical wisdom

04 Sep 2025
Endorsed for
Irritable Bowel Syndrome (IBS)
Rapid Access GP Appointment

Professor Richard Pollok

Professor Richard Pollok

Gastroenterologist
Is a colleague

I have known Mike for several years, working together both in the NHS and in the private sector. He is a trusted expert in his field and my patients always give excellent feedback about him.

21 Jul 2025
Endorsed for
Hepatology
Irritable Bowel Syndrome (IBS)

Dr Stephan Brincat

Dr Stephan Brincat

Nephrologist
Is a colleague

Mike offers a wealth of experience and knowledge to compliment his holistic care he provides for his patients.

20 May 2025
Endorsed for
Hepatology
Irritable Bowel Syndrome (IBS)
Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease

MD

Mr Jonathan Van Dellen

General Surgeon
Is a colleague

Extremely experienced colleague with years of experience in all aspect of gastroenterology .Strongly recommended .

03 Oct 2024
Endorsed for
Irritable Bowel Syndrome (IBS)
Hepatology

Dr Ajikumar Kavidasan

Dr Ajikumar Kavidasan

Respiratory Doctor
Is a colleague
Dr Michael Mendall logo

Get to know Dr Michael Mendall

FAQ

What are Dr Michael Mendall's reviews like?

Dr Michael Mendall's overall patient rating is 4.9 out of 5 stars on Doctify. This is based on 35 reviews.

What languages does Dr Michael Mendall speak?

Dr Michael Mendall speaks English

Where is Dr Michael Mendall located?

Dr Michael Mendall primarily practices at London Medical, located at 49 Marylebone High Street, London, United Kingdom, W1U 5HJ
See more locations

Does Dr Michael Mendall accept new patients?

Dr Michael Mendall generally accepts new patients.

Get in touch with this specialist to enquire as a new patient