Dr Simon Mark Greenfield

Dr Simon Mark Greenfield

Consultant Gastroenterologist


Specialises in

I am a highly experienced gastroenterologist practising in Hertfordshire and treat a wide range of conditions affecting the gut. I was appointed as a consultant in my current post on 1/2/1996, I have more than 23 years’ experience as a consultant.

Typical conditions that I treat include all forms of indigestion and all types of bowel problems, including constipation and diarrhoea and pancreas/bile duct problems. I am a skilled endoscopist practising all forms of endoscopy including gastroscopy, colonoscopy and ERCP. My 2017-2018 NHS data recorded 144 colonoscopies with a completion rate of 95.5%, 189 gastroscopies with a completion rate of 99%, 40 flexible sigmoidoscopies and 74 ERCPs. My Spire numbers will increase these figures by a modest amount.

While at St Thomas’ Hospital I completed my MD thesis on inflammatory bowel disease before completing my training at UCH and the Whittington Hospital, North London. Previously, I was fortunate enough to be awarded the British Society of Gastroenterology travelling fellowship to the gastrointestinal unit of the Medical University of South Carolina; this was a valuable learning experience.

When meeting a new patient my philosophy is to take a detailed history of a patient's problems and in particular to focus on any areas of diet that might be influencing symptoms. If required I may undertake a gastroscopy/colonoscopy, but I believe that this is only a small part of the treatment process and that it is important to take a holistic view when treating someone with gut symptoms. Apart from medication, dietary advice plays an important part in my treatment strategy.

I have published widely on topics such as colorectal cancer, inflammatory bowel disease, constipation and endoscopy.


Treatment information

Some of the principal treatments carried out by Dr Simon Mark Greenfield at Spire include:


Other treatments

  • ERCP - Endoscopic Retrograde Cholangio-pancreatography

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Important information about COVID-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire Harpenden Hospital.


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Additional information


Special clinical interests: Dyspepsia, inflammatory bowel disease, irritable bowel syndrome, hepatobiliary disorders and all endoscopy.

Professional memberships

Fellow Royal College of Physicians

British Society of Gastroenterology (BSG)

Professional leadership

Secretary to the Clinical Services and Standards Committee of the British Society of Gastroenterology (BSG)
Chairman of the Independent Practice Committee of the BSG


The Secrets of your Irritable Bowel Syndrome (IBS)

The Secrets of your Indigestion

Consultant Gastroenterologist. Queen Elizabeth II Hospital, Welwyn Garden City, Hertfordshire

Consultant Gastroenterologist, Lister Hospital, Stevenage, Hertfordshire

I moved from North London to the rural delights of Hertfordshire in 1997. I enjoy swimming with my club on a Saturday morning and then need the rest of the weekend to recover! I am a keen golfer, but fortunately will never have to make a living out of it. I enjoy the films of Martin Scorsese, the books of John Irving, the wickets of Jimmy Anderson and the goals of DD (he will remain unidentified).

Telephone 0800 585112
Website http://www.hertsgastro.com
Private secretary Finola Hall
Private secretary telephone 01438 285988
Private secretary email finolahall@nhs.net