Factor Viii Activity And Inhibitor

Test Code

LAB1116

Alias/See Also

Factor 8 Activity and Inhibitor

CPT Codes
85240, 85335

Includes

Factor VIII Inhibitor, EIA Screen and Factor VIII Activity, Clotting If Factor VIII Inhibitor, EIA Screen is positive, the Nijmegen Assay will be performed at an additional charge (CPT code(s): 85335).

Preferred Specimen

Blue Sodium Citrate

Minimum Volume

1 mL (x3)

Instructions

Submit a total of 6mL (2mL in each of 3 tubes). Centrifuge light blue-top tube 15 minutes at approx. 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and ship on dry ice.

Transport Temperature

Frozen

Specimen Stability

Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 14 days

Methodology
See individual tests

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.