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Factor VIII Antigen

Message
Platelet poor plasma: Centrifuge light blue-top tube 15 minutes at approximately 1500 x 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 ( Do not thaw. )


Test Code
LAB9290 F8G


Alias/See Also
F8G


CPT Codes
85244

Includes
@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Minimum Testing Volume: 0.5 mL Transport Temperature: Frozen Stability: Ambient: 4 HoursRefrigerated : 48 HoursFrozen -20 C: 30 DaysFrozen -70 C: 6 Months


Report Available
33-Days


Clinical Significance
1230170753



Last Updated: May 18, 2026


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.