900 youth clinic


The 900 clinic provides care for HIV-positive young people (aged 16 to 24 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 6626.

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)
  • Contraception
  • Cervical smear screening and referral to colposcopy
  • Vaccination (HAV, HBV)
  • STI treatment
  • HIV care management including viral load, CD4 and toxicity
  • Investigations of the complications of HIV/ART
  • Sexual health screening
  • Pregnancy investigation and management
  • Partner HIV and sexual health screening

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 months. Patients with severe immunosuppression and antiretroviral therapy (ART) adherence issues can attend up to weekly for dosset box filling, medical review and psychological support.


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:

Caroline Foster, consultant
Phone: 079 4900 9448


Sara Ayers or Susan McDonald, clinical nurse practitioners
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.


Outpatients appointments
020 3312 6626