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Thrombophilia phenotypic markers


Assays available

    • Antithrombin activity
    • Antithrombin antigen*
    • Protein C activity
    • Protein C antigen*
    • Free protein S antigen
    • Total protein S antigen
    • Classic APCR
    • Modified APCR
    • Anticardiolipin antibodies
    • IgG & IgM ß2-GPI antibodies*
    • Lupus anticoagulant screen
    • Plasminogen activity*

* These assays are not part of first line thrombophilia testing


Results are normally available within 14 days. External users may contact the laboratory for information related to result progress.


Thrombophilia markers are available during routine hours. Requests for urgent results or tests out of routine hours must be directed to a consultant of the Centre for Haemostasis and Thrombosis.

Sample requirements

Citrate (blue top tube)
Serum (yellow top tube)

One 5ml non-anticoagulated serum sample for Anticardiolipin testing.

Three citrated samples for Lupus anticoagulant screen & thrombophilia markers.


Please call 020 7188 2797, Monday to Friday, 9am-5.15pm.