The GUYS@Mary's clinic provides free, confidential sexual health advice, sexually transmitted infection (STI) screening and treatment for men who have sex with men. 


The GUYS@Mary’s clinic offers the following services:

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

Appointments for men who are not experiencing symptoms

If you would like a quick sexual health check-up and/or a vaccination, please book an appointment using our Check & Go service below. Check & Go is only suitable if you do not have symptoms and do not need to discuss PEP or PrEP.

GUYS@Mary's Check & Go


Appointments for symptoms, treatment and PEP or PrEP advice

If you are experiencing symptoms, need treatment or wish to discuss PEP or PrEP, please book an appointment using our online service below:

GUYS@Mary's appointments for symptoms, treatment and PEP or PrEP advice



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


This clinic is run on Wednesdays from 17.00 to 19.10.


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 through the online booking service above.


General Enquiries
020 3312 6626