Mr Ashish Sinha is a highly skilled and trusted consultant colorectal and general surgeon with over 15 years’ of experience based in Central and West London. He is a consultant surgeon at the world-renowned St Mark’s – The National Bowel Hospital, London and a senior clinical lecturer at Imperial College, London. He has expertise in inherited colorectal cancer syndromes and polyposis and is the consultant surgeon to the St Mark’s Centre for Familial Cancer.
He performs surgery for a wide range of conditions focusing principally on colorectal cancer, polyposis and other benign colonic conditions like diverticular disease. He typically performs minmally invasive or laparoscopic surgery. He offers laser surgery for treatment of common proctology conditions such as haemorrhoids, fistula and pilonidal sinus, as well as providing diagnostic colonoscopy for colorectal cancer prevention.
His surgical practice covers the full aspect of colorectal surgery including stoma reversal, inflammatory bowel disease (IBD) surgery including colitis and Crohn’s disease, prolapse surgery and excision of skin tags and warts.Additionally, he offers surgical treatment for conditions including hernia (inguinal/incisional, stoma related and abdominal wall), lumps and bumpsexcision and emergency treatment such as appendicectomy and abscess drainage.
Mr Sinha was awarded a Bachelor of Medicine and Bachelor of Surgery (BMBS) degree from the University of Nottingham in 2004. He undertook further training in general and colorectal surgery in the South East Thames Region, London surgical rotation. His research thesis into inherited colorectal cancers and cancer genetics over two years at the Polyposis Registry, St Mark’s Hospital, culminated in him being awarded a MD from Imperial College, London.
His work has been published in several peer-reviewed journals and he continues his research work, concentrating on inherited colorectal cancer syndromes, emergency general surgery in elderly patients and minimally invasive surgery.
He is a member of several medical organisations, including the International Society for Inherited Gastrointestinal Tumours and St Mark’s Association.
Clinics
The Clementine Churchill Hospital - part of Circle Health Group
Doctor Sinha has been amazing. Before the surgery , his calmness, his ability to explain complex medical problems into simple terms has been very reassuring.
When I met him for the first time , I knew I would trust him doing the job. After surgery , he checked on me regularly.
30 September 2025
C.D.
Verified patient
Mr. Sinha what can I say he an outstanding surgeon. “I can't thank you enough for the special, excellent care you have provided and for the unique gift you are to your patients.” “I am blessed that you are my doctor I have great confidence in you and can’t Thank you enough. ~S.V~
12 December 2023
S.V.
Verified patient
Excellent interaction, approach and follow up - would 100% recommend
Mr Ashish Sinha is a consultant specialising in Colorectal Surgery, with extensive experience in assessing and treating patients within this field.
Which conditions and treatments does Mr Ashish Sinha specialise in?
Mr Ashish Sinha is a colorectal Surgeon who provides assessment and treatment for Laparoscopy, Anal fistula surgery, Inflammatory bowel disease (IBD), Colorectal cancer, Hernia and Pilonidal sinus. During your consultation, you will be informed of the most suitable options following a personalised evaluation.
How many years of experience does Mr Ashish Sinha have?
Mr Ashish Sinha has 22 years of professional experience as a consultant colorectal Surgeon, providing specialist assessment and treatment in this medical field.
What do patients say about Mr Ashish Sinha?
Patients give a rating of 5.0 out of 5 to Mr Ashish Sinha, a score considered excellent. This average is based on 5 verified patient reviews, reflecting the experience of those who have attended an appointment.
Are Mr Ashish Sinha's reviews verified?
Yes. All Mr Ashish Sinha's reviews come from verified patients who have attended either an in-person or an e-Consultation appointment. We use a system that ensures authenticity and prevents fake reviews. Some profiles may also display reviews from other platforms, which follow their own verification policies, with the source always clearly indicated.
Where does Mr Ashish Sinha practise?
Mr Ashish Sinha practices in the following locations:
West London at Sudbury Hill, Harrow
W1G Marylebone London at 41 Welbeck St, London
Central London at The Princess Grace Hospital, 42-52 Nottingham Pl
West London at Northwick Park and St Mark's Hospital, Watford Rd, Harrow
In-person consultations are available at these locations as a Colorectal Surgery.
How can I book an appointment with Mr Ashish Sinha?
You can book an appointment with Mr Ashish Sinha directly from this page by selecting the time that suits you best. Alternatively, you can call the phone number shown if you prefer personalised assistance.
Does Mr Ashish Sinha see NHS patients?
Many specialists featured on Top Doctors also hold NHS positions. However, appointments arranged for Mr Ashish Sinha through this platform are private, either self-pay or covered by private medical insurance.
Does Mr Ashish Sinha offer private appointments?
Yes, Mr Ashish Sinha offers private appointments for patients seeking flexible and direct access to a consultant colorectal Surgeon.
Does Mr Ashish Sinha offer online consultations?
At the moment, Mr Ashish Sinha does not offer online consultations. You can book an in-person appointment from this page or call +44 02045527117. When calling, please mention that you are a Top Doctors patient.
Does Mr Ashish Sinha accept insurance?
Mr Ashish Sinha works with the following private medical insurance providers: Bupa, AXA, AVIVA, Cigna, WPA and Vitality. If your insurer is not listed, you may contact the practice directly to confirm your coverage.
What is Mr Ashish Sinha's availability?
Mr Ashish Sinha's availability depends on the appointment slots open at any given time. On this page, you can check current availability, and if no slots are shown, you can request an appointment or contact the practice directly.
What payment methods does Mr Ashish Sinha offer?
You can pay for your consultation with Mr Ashish Sinha using the following methods: Self-paying or Prepaid.
What languages does Mr Ashish Sinha speak?
Mr Ashish Sinha is a colorectal Surgeon who offers consultations in English, Hindi and Punjabi.
How is Mr Ashish Sinha selected to appear on this platform?
All doctors listed on Top Doctors, including Mr Ashish Sinha, undergo our rigorous selection process. Only one in five specialists meets the required standards to be included.
The doctor, or where applicable the hospital or medical centre in which the doctor provides services, undertakes to keep the information relating to the prices of services published on their profile on the Top Doctors platform up to date at all times, ensuring that such prices correspond to those effectively charged to patients. In the event of any discrepancy between the published price and the price ultimately charged to the patient, the doctor and/or the relevant hospital or medical centre shall be solely liable towards the patient and towards Top Doctors for any claim or financial difference arising therefrom.