Dr Gareth Sadler



GMC number: 4711625

Practising since: 2000



Consultation times

  • Monday 1800-2000
  • Overview
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020 8971 8000


I qualified from the University of Birmingham Medical School and undertook specialist training in the West Midlands and London Deaneries.

I have held a substantive consultant post in gastroenterology at St George's NHS Trust since 2012.

I am the former Endoscopy Training lead and Director of the Bowel Cancer Screening programme for SW London and am currently the Director of Endoscopy at St George's Hospital. I am a JAG-accredited colonoscopist and assessor for the National Bowel Cancer Screening Programme. I co-lead the advanced therapeutic colonoscopy service and co-chair the complex polyp meeting at St George's Hospital.

I run general gastroenterology outpatient clinics, participate in the care of admitted patients on the gastroenterology ward, and am part of the emergency endoscopy rota.

Dr Sadler sees adults only.

Special interests

I am interested in all aspects of luminal gastroenterology, including bowel cancer screening, anaemia, coeliac disease, indigestion/reflux, irritable bowel syndrome (IBS), and the investigation and management of a range of general gastroenterological symptoms, including diarrhoea, constipation, anaemia, abdominal pain and weight loss.

Personal interests

When not at work, I enjoy playing squash and badminton, mountain biking, and spending time with my wife and two children.

Treatments and tests offered by Dr Gareth Sadler at Nuffield Health

  • Colonoscopy
  • Colorectal surgery
  • Gastroscopy (or gastrointestinal (GI) endoscopy)
  • Flexible sigmoidoscopy
  • Diagnostic endoscopy
  • Ultrasound

Locations Dr Gareth Sadler works with

Related experience


  • GMC
  • British Society of Gastroenterology

Other posts held

  • St George's University Hospitals NHS Foundation Trust

Insurers Dr Gareth Sadler works with

Dr Gareth Sadler works with the following private medical insurance providers:

  • Allianz
  • AXA Health
  • AXA - Global Healthcare
  • Bupa
  • Cigna
  • Healix
  • Police Mutual
  • Simplyhealth
  • Vitality Health (Pru Health)
  • WPA


Dr Gareth Sadler does not hold a share or financial interest in this hospital, another Nuffield Health hospital or the company.

Dr Gareth Sadler does not have a share or financial interest in equipment used at this hospital or another Nuffield Health hospital.

Dr Gareth Sadler does not hold any paid advisory role(s) at this hospital or on behalf of Nuffield Health.