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Nikhil Thapar image

Dr Nikhil Thapar

Consultant Paediatric Gastroenterologist



Children's Services

Special Interests

General Gastroenterology including:

  • Gastro-oesophageal reflux and vomiting
  • Food Allergy (Gastrointestinal Allergy) and Coeliac disease
  • Abdominal pain
  • Constipation
  • Diarrhoea
  • Problems in infancy such as colic, excessive crying and discomfort
  • General concerns about feeding, growth and development

Specialist Paediatric Gastroenterology including

  • Severe (intractable, slow-transit) constipation
  • Intestinal pseudo-obstruction
  • Dysphagia


English & part-fluent Hindi, Punjabi, Swahili

NHS Base

Great Ormond Street Hospital NHS Foundation Trust


The Portland Hospital

215 Great Portland Street


I am a consultant paediatrician and specialist Paediatric Gastroenterologist at Great Ormond Street Hospital and the Academic Lead for Gastroenterology at UCL Institute for Child Health and Great Ormond Street Hospital. I have a strong passion for Paediatrics and Gastroenterology with a mission to improve the care of children suffering gastrointestinal conditions based on excellent clinical care and effective translation of contemporary advances in Medicine and research. I am married with 3 beautiful, very lively children!

I undertook my undergraduate medical training at Southampton University (graduated in 1993 with distinction honors) before going on to complete my professional specialist exams and training in Paediatrics and Paediatric Gastroenterology in Wessex then London.

I have a particular interest in neurogastroenterology and gut motility disorders and completed a PhD at the National Institute for Medical Research, London studying the development of the gut nervous system and novel treatments for gut disease including the use of stem cells. In 2004 I returned to, and was subsequently appointed as Honorary Consultant and Senior Lecturer at, Great Ormond Street Hospital and UCL Institute of Child Health. In 2012 I was appointed as the clinical academic lead for gastroenterology.

I run specialist NHS and private clinical services for children with gut motility (nerve and muscle) disorders, which include state-of-the-art diagnostics, in-patient and out-patient facilities. The service is also a designated UK national centre for the diagnosis and management of severe gut diseases including intestinal pseudo-obstruction and receives referrals internationally.

I also lead an international research team, which is closely integrated with the clinical service. I chair the British (BSPGHAN) gut motility disorders working group and sit on committees governing clinical gastroenterology and research across Europe (ESPGHAN, UEG and MCRN). I enjoy education and am an executive director of the Academy of Paediatric Gastroenterology ( and lead teaching initiatives for patients, parents and medical specialists.

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