Diagnostic haemostasis laboratories


Contact details

  • St Thomas' Hospital
    4th floor, North Wing
    Westminster Bridge Road
    London SE1 7EH 

    Routine laboratory: 020 7188 2799 
    Specialist assay laboratory: 020 7188 2797

  • Guy's Hospital
    Ground floor, Tabard Annexe
    Great Maze Pond
    London SE1 9RT

    Routine laboratory: 020 7188 9095

Our laboratories

Both the Guy's and St Thomas' have routine laboratories providing screening tests using state of the art analysers. 

  • St Thomas' operates a 24 hour a day laboratory
  • Guy's site operates within core hours (9am - 5.15 pm Monday - Friday)
  • The Centre for Haemostasis and Thrombosis (The Haemophilia Reference Centre) operates an anticoagulant clinic in Guy's outpatient's on a daily basis.
  • St Thomas' Hospital also has a specialist assay laboratory where phenotypic investigations for thrombotic and bleeding disorders are performed.

Laboratory at St Thomas' 

This laboratory operates 24 hours a day. Outside of core hours (9am - 5.15pm), there is a duty haemostasis biomedical scientist on site at all times. Tel: 020 7188 2797 / 2799. Bleep number 2005.

The duty biomedical scientist is at St Thomas' at all times to perform all coagulation screens, irrespective of urgency. Requests for specialist tests must be discussed with the clinician on-call for the Haemophilia Reference Centre who can be contacted via the switchboard on 020 7188 7188.

Laboratory at Guy's

Samples for coagulation screening tests are packaged by the on-call haematology biomedical scientist (Bleep 1190) and transported for processing at the St Thomas' haemostasis laboratory.

Contact the duty haemostasis biomedical scientist at St Thomas' on the numbers above for information regarding result progress analysis.

Please inform the laboratory at St Thomas' if the request requires urgent analysis.

Request forms

Please help us to help you by completing request forms (electronic or conventional physical forms) legibly with all the necessary information. It is essential that the patient details are clear and accurate and also that we have a clear indication of the destination for the report. It is vital that you indicate whether the patient is on any form of anticoagulation as this will affect result interpretation and in some cases the reference ranges.

Reference ranges for haemostasis investigations are periodically re-evaluated. Please contact Dr Gary Moore or Tina Whitham on 020 7188 2797 for current reference range information, or alternatively check the reference range stated on the patient report form.

Time limits for requesting additional examinations

Please contact the laboratory on 020 7188 2797 to discuss this matter.