Sexual health


Our sexual health clinics at the Jefferiss Wing offer testing, treatment and advice for all sexually transmitted infections (STIs). Where possible we will diagnose and treat you at your first visit. However, not all infections can be diagnosed immediately – samples may need to be sent off to our laboratories for analysis. If we find any infection, we will contact you immediately to ask you to return for treatment.

Our address is Jefferiss Wing, St Mary's Hospital, Praed Street, London W2 1NY.

We also run a range of specialist sexual health clinics.

Specialist sexual health clinics

Visiting our sexual health clinics

Clinics for patients who are not experiencing symptoms

If you’re not experiencing symptoms but would like a sexual health check-up, please book an appointment online using our Check & Go service below. Appointments for these clinics are released throughout the day.

If you need support when making your booking, please contact our reception team on 020 3312 6626.

Your appointment will be 30 minutes long. The first 10 minutes of your appointment is for registration so please arrive on time for your appointment. If you are more than 10 minutes late, you will need to rebook your appointment.

If you are unable to attend, please cancel your slot so that another person can be seen.

Check & Go appointments


Clinics for patients who are experiencing symptoms

If you’re experiencing new symptoms, you can come to our sexual health walk-in clinic Monday to Friday, with the exception of bank holidays, without booking an appointment. 
Below are the opening times for the walk-in clinic. Please note that you can register from 08.00 but you will not be seen until after 09.00.


08.00 to 18.15


08.00 to 18.15


11.45 to 18.15


08.00 to 18.15


08.00 to 15.15

Alternatively you can book an appointment in advance. Appointments for this clinic are released throughout the day.

 Concerned about symptoms?


For advice and more information about our sexual health clinics, please visit our patient information page. Please note that for the walk-in service, waiting times can vary, so we would advise that you allow at least two hours for your visit. 


If you would like to be seen in the GUYS@Mary's clinic, you can book an appointment online hereThe GUYS@Mary's clinic provides free, confidential sexual health advice, sexually transmitted infection (STI) screening and treatment for men who have sex with men. 

For advice and more information about our sexual health clinics, please visit our patient information page.

Need advice?


The sexual health clinics offer tests, treatment and advice for all sexually transmitted infections (STIs). 

You can use our sexual health service if:

  • You want a sexual health check-up 
  • You are concerned about a sexual encounter or if you have symptoms
  • You have been informed you have an infection – it doesn’t matter if this was diagnosed at the Jefferiss Wing or another clinic
  • You have been contacted by a partner recommending you have a sexual health check-up
  • You’re worried you have HIV or might have been exposed to HIV
  • You think you might be pregnant
  • You have been sexually assaulted

Conditions and treatments

We offer a full range of sexual health services run by a team of doctors, nurses and support workers. At our clinics we offer:

  • STI testing and treatment
  • Rapid HIV testing and post-exposure prophylaxis after sexual exposure (PEPSE)
  • Contraception including emergency contraception
  • Pregnancy testing
  • Hepatitis B vaccinations

Most of our clinics are walk-in, so in most cases you do not need to make an appointment, however some of our clinics are appointment-only. Please check specialist clinic pages for more information about how to access these services.