London · HA1 3UJ
St Mark's Hospital
St Mark's Hospital is a specialist bowel hospital, described by the trust as its centre of excellence for bowel cancer. It works from two locations: within Northwick Park Hospital in Harrow and at Central Middlesex Hospital in Park Royal, with satellite clinics at Ealing.
Contact details, visiting and parking from the hospital’s official website, checked on 26 September 2026. Please check with the hospital before you travel.
St Mark's Hospital phone numbers
Main switchboard020 8864 3232Northwick Park location; Central Middlesex location 020 8965 5733- Change or cancel St Mark's appointmentsCall centre Mon–Fri 10am–5pm0208 235 4051
- Car parking office020 8869 3803
- PALS (patient advice and liaison)Mon–Fri 9.30am–4.30pm (closed bank holidays). 020 8869 5118 is for Northwick Park; for Ealing, Central Middlesex and St Mark's call 020 8967 5653020 8869 5118
PALS email: LNWH-tr.PALS@nhs.net
In an emergency call 999. For urgent medical advice call NHS 111.
Where is St Mark's Hospital?
Northwick Park Hospital, Watford Road, Harrow, HA1 3UJ
Directions in Google MapsNearest NHS hospitals
Visiting times at St Mark's Hospital
Adult wards
2pm – 8pm
2pm–8pm, two named visitors per patient
Trust-wide policy; check the ward directory for individual ward arrangements.
Parking at St Mark's Hospital
Uses the Northwick Park or Central Middlesex car parks (St Mark's entrance at Northwick Park is by car park 4). Same trust-wide charges; car parks run by APCOA.
- up to 1 hour£3.30
- up to 2 hours£6.20
- up to 3 hours£6.60
- up to 5 hours£7.70
- up to 8 hours£11.60
- up to 24 hours£14.80
Free or reduced parking: Blue Badge holders park free for up to 6 hours in disabled bays. Dialysis and chemotherapy outpatients pay £1 a day (proof needed).
Shops, food and facilities
- St Mark's tea bar (level 3, St Mark's building, Northwick Park)
How London North West University Healthcare NHS Trust performs
NHS England publishes waiting times for London North West University Healthcare NHS Trust as a whole, covering St Mark's Hospital and the trust’s other hospitals.
Waiting-list data: July 2026Published by NHS England on · next release expected 8 October 2026 · sources
NHSQueue score: 5.3 out of 10
Around averageLondon North West University Healthcare ranks 56 of 126 NHS hospital trusts in England on the latest official figures.
- Waiting list (share within 18 weeks)better than 57% of trusts
- A&E (seen within 4 hours)better than 70% of trusts
- Diagnostic tests (waiting under 6 weeks)better than 24% of trusts
- Cancer (28-day and 62-day standards)better than 79% of trusts
- CQC inspection ratingbetter than 25% of trusts
Each measure is compared with every other NHS hospital trust, then combined: waiting list 35%, A&E 20%, tests 15%, cancer 15%, CQC 15%. How the score works
Waiting list for planned treatment
12.0 weeksD wait grade
median wait · 66.1% under 18 weeks · 80,601 waiting
−681 waiting vs June 2026
Waiting times by specialty
A&E
76.5%
seen within 4 hours in August 2026 · 29,098 attendances
England: 75.0%
A&E waiting times
Diagnostic tests (MRI, CT, endoscopy…)
26.7%
waiting 6+ weeks · 21,175 waiting for a test
July 2026 · standard: under 1%
Test waits
Cancer: diagnosed within 28 days
81.8%
81.7% treated within 62 days
July 2026 · standard 75%
Cancer waiting times
Other hospitals run by London North West University Healthcare
- Northwick Park HospitalA&E open 24 hours · Watford Road, Harrow, HA1 3UJ
- Central Middlesex HospitalUrgent treatment centre · 8am–9pm daily (last registration 8pm) · Acton Lane, Park Royal, London, NW10 7NS
- Ealing HospitalA&E open 24 hours · Uxbridge Road, Southall, UB1 3HW
London North West University Healthcare NHS Trust: all hospitals and contact details →
St Mark's Hospital: common questions
What is the phone number for St Mark's Hospital?
The main number for St Mark's Hospital is 020 8864 3232. Other useful numbers: change or cancel st mark's appointments 0208 235 4051; car parking office 020 8869 3803. For help with a complaint or concern, PALS is on 020 8869 5118.
What are the visiting times at St Mark's Hospital?
Adult wards: 2pm–8pm, two named visitors per patient. Check with the ward before you travel, as times can change.
How much is parking at St Mark's Hospital?
Uses the Northwick Park or Central Middlesex car parks (St Mark's entrance at Northwick Park is by car park 4). Same trust-wide charges; car parks run by APCOA. Charges: up to 1 hour: £3.30, up to 2 hours: £6.20, up to 3 hours: £6.60, up to 5 hours: £7.70. Blue Badge holders park free for up to 6 hours in disabled bays. Dialysis and chemotherapy outpatients pay £1 a day (proof needed).
Where is St Mark's Hospital?
St Mark's Hospital is at Northwick Park Hospital, Watford Road, Harrow, HA1 3UJ. It is run by London North West University Healthcare NHS Trust.
Sources: NHS England statistics on referral to treatment (RTT) waiting times (July 2026), A&E attendances (August 2026), diagnostic waiting times (DM01) and cancer waiting times, published 10 September 2026; hospital sites from the nhs.uk organisation data. Figures are checked against the official national totals before every update.
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