Sexual health clinic near King's Cross: private walk-in STD test at Baker Street

If you are near King's Cross and need a private sexual health test, Marylebone Diagnostic Centre at Baker Street is the closest private clinic. It is 15 minutes by tube or around 10 to 12 minutes by taxi. No appointment needed, no GP referral, and nothing shared with your NHS record. Walk in Monday to Saturday between 8am and 4pm and receive your results within 24 to 42 hours.

A taxi or Uber from King's Cross St Pancras to 73 Baker Street takes around 10 to 12 minutes in normal traffic via Euston Road and Baker Street. This is the most direct option if you are travelling with luggage or prefer not to use the tube.

You do not need to register, book, or bring any documents to walk in at MDC. The process from arrival to leaving typically takes under 30 minutes.

1. Arrive at reception. Let the team know you are a walk-in. Tell them which tests you want or ask for a recommendation based on your situation.
2. Brief clinical check-in. A clinician will ask a few quick questions about your concerns and any symptoms. This takes around 5 to 10 minutes and helps confirm the right tests for you.
3. Sample collection. Depending on the tests selected: a blood draw, urine sample, or swab. Most appointments including sample collection take under 20 minutes.
4. Results by secure email. Within 24 to 42 hours, your results are sent directly to the email address you provide. Nothing is shared with your GP, NHS, or any third party unless you request it.

The main NHS sexual health clinic serving the King's Cross area is the Mortimer Market Centre on Capper Street in Euston, run by Central and North West London NHS Foundation Trust. Testing there is free and the clinical quality is excellent. It is approximately 10 minutes on foot from King's Cross St Pancras.

If cost is the main consideration, the Mortimer Market Centre is the right choice. If you need results quickly, want testing that does not appear on your NHS record, or want a broader panel than the standard NHS screen, MDC is the nearest private alternative to King's Cross.

Yes. Walk-ins are welcome at MDC Monday to Saturday, 8am to 4pm. No booking, no referral letter, and no prior registration is needed. If you want to guarantee a specific time, you can also book online in advance.

Yes. MDC does not require your legal name. We need a name to label your sample, but it can be a first name only or a name of your choosing. Results go to your email address and nowhere else. Nothing appears on your GP or NHS record. See our confidential STI testing page for more detail.

Taxi or Uber is the quickest door-to-door option at around 10 to 12 minutes. By tube, the Circle or Hammersmith and City line from King's Cross St Pancras runs directly to Baker Street in around 12 to 15 minutes with no changes on most services. The walk from Baker Street station to MDC at number 73 is 5 minutes.

No fasting is required for sexual health testing. If you are providing a urine sample for chlamydia or gonorrhoea, avoid urinating for at least one hour before your appointment to improve sample quality. No other preparation is needed for blood tests or swabs.

A clinician will contact you directly to explain your result and advise on next steps. For most bacterial infections, treatment is straightforward and highly effective. For infections requiring specialist care, your MDC team will direct you to the right NHS service. A positive result is the beginning of a managed process. See our STI treatment costs guide for more on what happens after a positive result.