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Professor Omar Faiz

Consultant Colorectal and Intestinal Surgeon

BSc(Hons) MBBS FRCS(Gen Surg) MS

Practices at: BMI The Clementine Churchill Hospital

A photo of Professor Omar Faiz

Omar Faiz is the Divisional Clinical Director and a Consultant Colorectal Surgeon at St Mark's Hospital and Professor of Practice in Colorectal Surgery at Imperial College.

His principal areas of clinical interest within colorectal surgery are the surgical management of Inflammatory Bowel Disease (IBD), hereditary cancer syndromes (such as Polyposis), colorectal cancer and intestinal neuroendocrine tumours (NET). He also sees patients with colorectal problems such rectal bleeding or change of bowel habit. He also undertakes a wide range of coloproctological procedures such as laparoscopic colectomy, total colectomy, anterior resection, restorative proctocolectomy (ileoanal pouch), abdominal wall hernia and reconstruction, haemorrhoidectomy (including HALO procedure) as well as anal fistula procedures which include FiLAC (Laser) and VAAFT treatment.

He trained in General and colorectal Surgery within London and the South East of England and went on to undertake specialist colorectal fellowships at St Mark’s Hospital and Valencia University Hospital prior to taking up a consultant post at Imperial College in 2008 (St Mary’s Campus) and then moving on to taking up a consultant position at St Mark’s hospital in 2012.

Professor Faiz has wide research interests and he has supervised 20 PhD and MD research fellows at Imperial College. His principal research interests include colorectal surgical epidemiology, health services research and surgical outcome research. Additionally he has authored 260 papers in peer-reviewed journals. He has also authored 11 book chapters and three text books.

Professor Faiz holds, or has held, various leadership positions at a national level. He is the ex-Chairman of the Association of Coloproctology of Great Britain and Ireland (ACPGBI) IBD subcommittee and Chair of the national Ileal Pouch Registry. He has contributed twice towards guideline development for the 'IBD Standards' and also NICE in 2015. Prof. Faiz has Chaired an international gastrointestinal surgery initiative of Global Comparators - a benchmarking and quality improvement group comprising sixty highly recognised worldwide academic hospitals (2014-2018).

He has previously represented the ACPGBI on the Inflammatory Bowel Disease Standards board and is the Lead for Quality in IBD Surgery for the ACPGBI. He is currently on the Board of Surgical-European Crohn's and Colitis Organisation (S-ECCO) and is an Associate Editor for the journal Colorectal Disease.

Furthermore, In 2018 the Daily Mail published a Good Doctors Guide for IBD, compiled through clinical peer consensus, where Professor Faiz was listed and described as 'a very good, high volume surgeon at a major centre, supported by an excellent team.’

Clinical Interests

  • Abdominal wall reconstruction
  • Closure of stoma
  • Colonoscopy
  • Diverticular disease
  • Fissure
  • Fistula
  • Flexible sigmoidoscopy
  • Haemorrhoid
  • Hernia (abdominal wall)
  • Inflammatory bowel disease
  • Proctology
  • Rectal cancer
  • Small bowel resection

Professional Memberships

  • The Association of coloproctology of Great Britain and Ireland
  • Royal College of Surgeons 
  • Royal society of Medicine 
  • Board of Surgical-European Crohn's and Colitis Organisation


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