Private STI Clinic London
Confidential STI testing and treatment on Harley Street. Discreet billing, experienced clinicians, same-day appointments.
FAST Screen — results in 6 hours
£350 — HIV, syphilis, chlamydia and gonorrhoea. Consultation, examination and prescription included.
Confidential
Discreet billing as Medical Express Clinic
Doctor-led
Experienced Harley Street clinicians
CQC regulated
Private clinic you can trust
STI testing prices
| Package / test | Price | Turnaround | Covers |
|---|---|---|---|
| Individual test (from) | £104 | 24 hours (6 hours on FAST) | Chlamydia, gonorrhoea, HIV, syphilis and more |
| Bronze Screen | £250 | Blood 24 hrs; urine/swab up to 3 days | HIV, syphilis, chlamydia, gonorrhoea + consultation |
| FAST Screen Simple | £350 | 6 hours | HIV, syphilis, chlamydia, gonorrhoea + consultation |
| Gold Screen | £475–£490 | Blood 24 hrs; urine/swab up to 3 days | 11+ infections including hepatitis B & C |
All screening packages include a doctor consultation, examination if needed, and prescription where clinically appropriate.
Turnaround times
| NHS GUM (typical London) | Sexual Health Clinic London | |
|---|---|---|
| Same-day appointment | Walk-in slots limited; waits vary by borough | Walk-in or book online, six days a week |
| Appointment wait | Often 2–6 weeks for routine GUM | Same day or next day at Harley Street |
| Core STI results | Typically 7–14 days | 6 hours (FAST) or 24 hours (standard bloods) |
| Doctor consultation | Included at NHS GUM | Included in all screening packages |
| Same-day treatment | When clinically appropriate | Prescription or on-site injection (e.g. syphilis) |
| Billing discretion | Free; appears on NHS record if registered | Private billing; pseudonym and cash accepted |
Private STI testing vs NHS sexual health services
NHS GUM clinics provide excellent free care — including PEP after HIV exposure. Private Harley Street testing is chosen for same-day access, 6-hour FAST results, broader panels, and billing that stays off your NHS GP record unless you request otherwise.
| NHS | Private (SHCL) | |
|---|---|---|
| Cost | Free | From £104 per test; packages from £250 |
| Best for | Routine screening, PEP, complex HIV care | Same-day appointments, 6-hour results, discreet payment |
| FAST Screen (6 hr) | Not routinely available | £350 — HIV, syphilis, chlamydia, gonorrhoea |
| GP record | Results on NHS record if registered with GP | Not shared with NHS GP unless you request it |
| Laboratory standard | UKAS-accredited NHS labs | UKAS-accredited partner laboratories (ISO 15189) |
References: BASHH (2024) — Standards for STI management; NICE CKS (2024) — Sexually transmitted infections — testing overview; UKHSA (2024) — Sexually transmitted infections and screening data. For PEP within 72 hours of HIV exposure, contact NHS sexual health or A&E immediately — we do not offer PEP.
Popular tests
Full guide: same-day STI results
For preparation tips, FAST vs standard package comparison, and who same-day testing is for, read our clinician-reviewed guide.
Same-day STI tests — what to expectBroader Harley Street care
For patients who prefer the Medical Express Clinic brand or need linked GP and consultant services, our Harley Street GUM clinic offers doctor-led care.
Harley Street GUM at Medical ExpressFrequently asked questions
What is the difference between an STI clinic and a GUM clinic?
GUM (genitourinary medicine) clinics specialise in sexual health. Our private STI clinic offers the same core screening, diagnosis and treatment in a discreet Harley Street setting.
Is STI testing confidential?
Yes. Appointments are private and billing appears as Medical Express Clinic. We do not share results with employers or insurers without your consent.
Do you offer STI treatment on the same day?
Where clinically appropriate, treatment can begin at your visit or shortly after results. Your doctor will advise based on symptoms and test type.
All medical content is reviewed by qualified healthcare professionals registered with the General Medical Council (GMC).