Mr Daniel O'Leary
Consultant Colorectal Surgeon
MB (Hons), BSc (Hons), MCh, FRCSI (Gen)
I have been a consultant in general and colorectal surgery in Portsmouth since 1999. My clinical work has involved emergency and elective management of patients with colorectal disease. My private practice is based at Spire Portsmouth Hospital, where I have a weekly clinic and operating sessions and endoscopy.
I have worked to improve surgical care in Portsmouth including development of the Surgical High Care Unit, where I have been Surgical Lead from 2008 - 2025. I was Clinical Director of the Colorectal Service 2005-2010.
I graduated MB with honours from University College Dublin and trained in surgery to FRCSI level. I then completed a Research Fellowship at Boston University, USA. I undertook my higher surgical training in Bristol and the South West. I completed training in colorectal surgery at St Mark’s Hospital, London – the pre-eminent referral centre for complex colorectal disease in the UK.
I obtained first place and the gold medal of the Association of Surgeons of Great Britain and Ireland in the Intercollegiate Examination in Surgery 1997. I have written chapters in four books and have written or collaborated on 37 peer-reviewed publications. I am a former trainer for the M27 coloproctology course.
Treatment information
Some of the principal treatments carried out by Mr Daniel O'Leary at Spire include:
General surgery
- Anal fistula surgery
- Flexible sigmoidoscopy
- Haemorrhoids removal treatment
Other treatments
- Botox treatment for anal fissure
- HALO/THD procedure for Haemorrhoids
- Lay-open or plug for anal fistulas
- Proctology
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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 Portsmouth Hospital.
Additional information
Clinical interests
Rectal bleeding, Haemorrhoids (piles), anal fissure, anal fistula; flexible sigmoidoscopy and treatment of these conditions. Assessment and investigation of abdominal pain, change in bowel habit, bowel incontinence.
Qualification and professional memberships
MB, BCh, BAO / University College Dublin (NUI) / 1982
(Hons, second class)
BSc anatomy / University College Dublin (NUI) / 1984
(First Class Honours)
MCh / University College Dublin (NUI) / 1992
(Master’s in Surgery)
FRCSI / Fellow of the Royal College of Surgeons of Ireland. / 1986
First place
FRCS / Fellowship of the Royal Colleges of Surgeons / 1992
ad eundum
FRCSI (Gen) / Fellow of the Royal College of Surgeons of Ireland. / 1997
First place
Professional memberships
Royal College of Surgeons
Association of Coloproctology of Great Britain and Ireland
St Mark’s Association
Senior Staff Group, Portsmouth Hospitals NHS Trust
Professional leadership
Surgical Director Surgical High Care Unit, Queen Alexandra Hospital, Portsmouth
Lead Clinician Portsmouth/Chichester Multidisciplinary Team managing Anal Cancer
President Portsmouth and Isle of Wight Ileostomy Association
Lead clinician for Colorectal Cancer Services for Portsmouth NHS Trust (2003 - 2014)
Clinical Director of the Colorectal Unit (2005 – 2010) and Clinical Lead (2013 - 2015)
Chair of Colorectal Site Specific Group of the Central South Coast Cancer Network (2003 - 2009)
Lead Clinician Joint Anal Cancer MDT Portsmouth and Chichester (2007- 2020)
Surgical Lead, Surgical High Care Unit, Portsmouth Hospitals NHS Trust
Research and publications
- Botox treatment for anal fissure
- Improving outcomes for colorectal cancer
- Improved staging of colorectal cancer and accelerated recovery programme after colorectal surgery
- MDT decision-making in colorectal cancer
- Quality of life in colorectal cancer management
Current NHS posts
Consultant General and Colorectal Surgeon, Portsmouth Hospitals NHS Trust (1999-present).
Personal profile
My wife is a doctor; we have four children. When I am not working, I enjoy spending time with my family, DIY and walking.
Contact information
| Private secretary | Michele Murphy |
| Private secretary telephone | 07720 394 563 |
| Private secretary email | michele.murphy1964@gmail.com |