Coronavirus update for HIV services

We’re making changes to our sexual health and HIV services to help respond to coronavirus and protect our patients, staff and visitors. Learn more on our HIV page.


The 900 clinic provides care for HIV-positive young people over the age of 16 years who are either newly diagnosed or transitioning from children's services to adult services.

We are the largest transitional care service for young adults living with HIV in Europe, supporting a seamless transition from children's to adult care with a lead transitional care consultant. 

Our multidisciplinary team provides medical, psychological, dietetic, contraceptive, sexual health and peer support for young adults living with HIV and their partners. 

We provide a walk-in service for registered patients, but if you prefer you can book an appointment in advance by calling 020 3312 3405 or 020 3312 3406. If you need to change or cancel your appointment, you can email

As part of our clinical care we also provide peer support through our close partnership with Positively UK


The 900 youth clinic offers:

  • Antiretroviral therapy (ART)
  • Peer support services
  • Psychology and mental health services
  • Contraception
  • Cervical smear screening and referral to colposcopy
  • Vaccination (HAV, HBV, HPV)
  • HIV care management including viral load, CD4 and toxicity
  • Investigations of the complications of HIV/ART
  • Sexual health screening and treatment
  • Conception and pregnancy management
  • Partner HIV and sexual health screening
  • Medical, nursing and psychological support and care in partnership with the inpatient team at St Mary's Hospital, should hospital care be needed

What to expect at your appointment

Please bring along with you a list of current medications and, if available, a record of your medical and vaccination history.

Follow up for stable patients is usually every four to six months through booked appointments, however all patients registered with the 900 clinic can attend the walk-in service on Wednesdays from 14.00 to 16.00. Patients with severe immunosuppression and antiretroviral therapy (ART) adherence issues can attend up to weekly for dosset box filling, medical review and psychological support.


Additional information for patients

Please see these links and leaflets from trusted sources for helpful information about living with HIV:


900 youth clinic
Clinical Trials Centre
Winston Churchill Building
St Mary’s Hospital
Praed Street
London W2 1NY


14.00 to 17.30 every Wednesday


GP and secondary care

To refer please contact:

Dr Caroline Foster, consultant adolescent infectious diseases
Phone: 079 4900 9448


Dr Sarah Fidler
Tel: 079 1220 5671

Sara Ayers, clinical nurse practitioner
Phone: 020 3312 6733

GP advice

GPs and referrers are welcome to contact Dr Caroline Foster for advice about referrals.  

Phone: 020 3312 6349 or 079 4900 9448

Additional information

All members of the team lecture nationally and internationally on development of HIV transitional care services and the long-term complications of perinatally acquired HIV-1 infection.