Same day STD testing in London — walk in today, no appointment needed

When you need an STD test today — not next week, not after a GP referral, not after sitting in an NHS queue — the question is simple: where can I go right now, and how quickly will I have an answer?

At Marylebone Diagnostic Centre on Baker Street, same day STD testing is available Monday to Saturday with no appointment needed. Most results come back within 24–48 hours. You walk in, give a sample, and have your answer fast — without an NHS queue or a GP referral.

This page covers exactly how same day testing works at MDC — which tests qualify, how fast each one is, what it costs, and how to get there from anywhere in central London.

Not every STD test produces a result on the same day — it depends on what we are looking for and how the sample is processed. Here is exactly what to expect at MDC.

The process is designed to be as fast and low-friction as possible. No referral letter, no waiting room registration, no awkward conversations at a reception desk.

NHS sexual health clinics do offer free STD testing — but same day availability, speed of results, and discretion work very differently. Here is an honest comparison.

The NHS remains the right choice if cost is the primary concern and you can wait. Private same day testing at MDC is for people who need an answer today — because of timing, because of privacy, or simply because waiting is not an option.

MDC is at 73 Baker Street, W1U 6RD — in the middle of central London, reachable in under 20 minutes from most parts of the city.

• From Baker Street tube: 5-minute walk. Jubilee, Metropolitan, Hammersmith & City, Circle lines.
• From Paddington: 12 minutes by tube (Circle line, one stop to Baker Street) or 18 minutes on foot.
• From Oxford Circus: 10 minutes by tube (Victoria line to Warren Street, then 12-min walk) or 20 minutes on foot via Marylebone High Street.
• From King's Cross: 15 minutes by tube (Circle or Hammersmith & City line direct to Baker Street).
• From Soho / Covent Garden: 20 minutes by tube or 25 minutes on foot via Regent Street.

There is no public parking directly outside but pay-and-display bays are available on Baker Street. The clinic entrance is discreet — no signage visible from the street indicating the nature of the service.

Yes. Walk-ins are welcome Monday to Saturday, 8am to 4pm. No appointment, no GP letter, no prior registration needed. You can also book online if you want to confirm a specific time slot.

The Advanced Sexual Health Panel returns results within 24–42 hours — the fastest turnaround on the site. Most other blood tests return within 1–2 working days, which is still significantly faster than NHS testing. The key advantage of attending today is that you are not waiting weeks for an appointment — you get tested now, and results follow quickly.

Unfortunately no test at MDC currently returns results within a few hours — results start from 24 hours depending on the panel. If you need a result the same evening, the most accurate advice is to call MDC directly on +44 7495 970109 before attending, as testing options may change.

No fasting is required for STD testing. If you are providing a urine sample for chlamydia or gonorrhoea, avoid urinating for at least one hour before your appointment — this improves sample quality. For blood tests and swabs, no preparation is needed.

Yes. Most patients choose to test for several infections at once. The Advanced Sexual Health Panel (£249) covers 12 infections from a single appointment. Your clinician will advise which combination makes sense based on your exposure and symptoms.

Yes — and this is actually the most important group to test. Most STDs including chlamydia, gonorrhoea, HIV, and syphilis produce no symptoms in the early stages. Routine screening is recommended after any unprotected sex, a new partner, or a change in circumstances — regardless of how you feel. See our full private STD testing page for more on who should test and when.