Whilst at St Thomas’ Hospital Dr Greenfield completed his MD thesis on inflammatory bowel disease before completing his training at UCH and the Whittington Hospital, North London. Previously, he was fortunate enough to be awarded by the British Society of Gastroenterology a travelling fellowship to the gastrointestinal unit of the Medical University of South Carolina; this was a valuable learning experience.
Dr Greenfield is a highly experienced gastroenterologist practising in Hertfordshire and treats a wide range of conditions affecting the gut. Typical conditions that he treats include all forms of indigestion, all types of bowel problems including constipation and diarrhoea and pancreas/bile duct problems. He is a skilled endoscopist practising all forms of endoscopy including gastroscopy, colonoscopy and ERCP. When meeting a new patient his 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 he may undertake a gastroscopy/colonoscopy but he 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 of Dr Greenfield's treatment strategy.
He has published widely on topics such as colorectal cancer, inflammatory bowel disease, constipation and endoscopy.