The GUYS@Mary's clinic provides free, confidential sexual health advice and screening for men who have sex with men. To be seen at this clinic you can call to book an appointment. There are also walk-in slots available. Please note that capacity for walk-in patients is limited and we strongly encourage you to make an appointment in order to keep your waiting time to a minimum.


As well as routine sexual health screening and treatment, the GUYS@Mary’s clinic offers additional services including: 

  • Rapid HIV testing with results within 15 minutes
  • Hepatitis B vaccinations 
  • Testing and treatment of sexually transmitted infections
  • Safe sex advice 
  • Chemsex advice and support 
  • Post-exposure prophylaxis for HIV (PEP) 
  • Pre-exposure prophylaxis (PrEP) support and advice
  • Free condoms


GUYS@Mary's clinic
First floor
Jefferiss Wing
Praed Street
St Mary's Hospital
London W2 1NY


This clinic is run on Wednesdays from 17.30 to 19.15.


020 3312 6626

What to expect at your appointment

When you arrive please go to the clinic reception on the first floor of the Jefferiss Wing. If you are a new patient you will be asked to complete a short registration form.

You will receive some results during your visit and any others will be sent via a text message within a week.


Entry to the clinic is by self-referral. GPs should encourage patients to call to book an appointment or if need be, come to the department between 17.30 and 19.00 on a Wednesday.


General Enquiries
020 3312 6626