Blood Group Genotyping

This test is referred to another lab outside our network
This does not affect where samples are sent and where your results are issued.
The Blood Transfusion department of Guy’s and St Thomas’ Hospitals offers a comprehensive service. However, there are a range of specialised tests which are referred to specialist laboratories at NHS Blood and Transplant (NHSBT).
The local laboratory is at Tooting where there are two main laboratories, Red Cell Immunohaematology (RCI) and Histocompatibility and Immunogenetics (H&I) and also the International Blood Group Reference Laboratory (IBGRL) in Bristol.
Please discuss requirements for referral tests with the Laboratory and/or Haematology SpR before requesting. For information on how to order the test contact the Transfusion Laboratory.
For further information, including sample requirements and turn around times please refer to the NHSBT website:

Clinical details: 
For further information please refer to the GSTT Clinical Guidance Policy.
Sample type and Volume required: 
Discuss with Laboratory, or refer to NHSBT Website.
Turnaround time: 
Discuss with Laboratory, or refer to NHSBT Website.
Special sample instructions: 

Samples for Transfusion testing must include the following minimum details:

All details must be legibly handwritten on the blood tube.


Surname (in full)

Forename (in full)

GSTT Hospital Number*

Date of Birth

Date and time of sample


Signature of the person taking the sample

*Most samples from GP surgeries may be accepted without a hospital number. However samples for transfusion testing on antenatal patients must always have a GSTT hospital number.

Blood Transfusion Laboratory at Guy's and St Thomas' Hospital
020 7188 4774
Blood Transfusion Laboratory
St Thomas' Hospital
North Wing, 5th Floor
St Thomas' Hospital
Westminster Bridge Road
London SE1 7EH

Blood Transfusion Laboratory
Guy's Hospital
Southwark Wing, 4th Floor
Great Maze Pond
London SE1 9RT
For clinical advice or interpretation of results, please contact the laboratory in the first instance.

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Last updated: 05/12/2016