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Lab Test Dictionary

Factor VIII Antigen (90879)


Immunoassay (IA)


Factor 8

Specimen Type


Performing Lab

Quest Diagnostics San Juan Capistrano

Epic ID

Other Reference Test

Lab Test Days

As needed at least 1x per Month

Standard TAT

2-31 Days

Collection Information

Specimen Required

(one) 1.8 mL or (one) 2.7 mL Blood

Container Type

Light Blue (Sodium Citrate)

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: 4 Hours; Refrigerated: 48 Hours; Frozen: 6 Months

Test Volume Required

1 mL Platelet Poor Plasma

Minimum Test Volume

0.5 mL Platelet Poor Plasma

Processing Instructions

Platelet-poor plasma: Centrifuge light blue-top tube for 15 minutes at approximately 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 screw-cap vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic screw-cap vial. Plasma must be free of platelets (<10, 000/mcl). Freeze immediately and send frozen.

CPT Codes