Our Addresses

St Mark’s the National Bowel Hospital

Central Middlesex, Acton Lane, London NW10 7NS

St Mark’s at Northwick Park

Watford Road, Harrow, Middlesex HA1 3UJ

St Mark’s at Ealing Hospital

Uxbridge Road, Southall, Middlesex UB1 3HW

Getting Here

For travelling to our sites by car or public transport, please click here.


If you don’t know the direct number for the person or department you wish to speak to, you can call our hospital switchboard on 020 8864 3232. This is an automated answering service. Our switchboard is always very busy, so if you know the number of the person or department it is best to phone directly.

Some of the more frequently requested phone numbers at St Mark’s are detailed below:

St Mark’s Wards

Outpatients Appointments: 020 8235 4051
Outpatients Department: 020 8963 8853

Lennard-Jones Intestinal Rehabilitation Unit

Intestinal Rehabilitation Advice Line: 020 8453 2080
Gladstone option 1: 020 8453 2027
Gladstone option 2: 020 8453 2029
Roundwood option 1: 020 8453 2215
Roundwood option 2: 020 8453 2149

Stoma and Pouch Care

Stoma Care: 020 8453 2196
Pouch Care: 020 8453 2099

St Mark’s Endocopy

St Mark’s, Central Middlesex
Endoscopy general enquiries: 020 8963 8816
St Mark’s at Northwick Park
Endoscopy working hours: 020 8235 4130 
Endoscopy out-of-hours: 020 8235 4131
St Mark’s at Ealing
Endoscopy: 020 8967 5617

St Mark’s Bowel Cancer Screening has its own website:
London Screening Hub free helpline: 0800 707 6060

CT Colonography

For appointments booked at St Mark’s Hospital, Central Middlesex and St Mark’s at Northwick Park: 07826 513567. For appointments booked at St Mark’s at Ealing Hospital: 020 8967 5181

Sir Alan Parks Physiology And Pelvic Floor Biofeedback Unit: 020 8963 7189
IBD Advice Line Service: 020 8453 2368
St Mark’s Centre for Familial Intestinal Cancer (Polyposis and Lynch Syndrome): 020 8453 2656
Sir Alan Parks Physiology And Pelvic Floor Biofeedback Unit: 020 8963 7189
St Mark’s Macmillan Support Helpline 020 8453 2170

St Mark’s Hospital Foundation

St Mark’s Hospital Foundation supports cutting-edge research and education at St Mark’s Hospital with fundraising and academic support services. If you are interested in supporting us or just to find out more about what we do, you can call us on 020 8453 2346.

Referral Guidelines

If you are a GP or clinician looking to make a referral to St Mark’s Hospital, please visit our Referral Guidelines page by clicking here.

Trustplus (private patients)

If you are a private patient, you can contact Trustplus; the private patient unit for St Mark’s, Northwick Park and Central Middlesex Hospitals.

TrustPlus Inpatients and Daycare Reservations: 020 8869 3099 or 020 8869 3394. This line is monitored from 8.00 a.m. to 4.00 p.m.

TrustPlus Outpatients: 020 8869 3390 or 020 8869 3112. This line is monitored from 8.00 a.m. to 7.00 p.m. For general enquiries, email