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Factor VIII Inhibitor Panel

Message
Patient must not be receiving Coumadin (warfarin) or heparin therapySpecimen must be collected prior to factor replacement therapy. Collect full tubes, following standard venipuncture techniques.


Test Code
LAB8739 F8INB


Alias/See Also
F8INB


CPT Codes
85240| 85390

Includes
This test is for factor VIII inhibitors only@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Processing Instructions (Lab use only): Centrifuge, transfer all plasma into a plastic vial, and centrifuge plasma again.Aliquot 1-2 mL plasma into 3 separate plastic vials, leaving 0.25 mL in the bottom of centrifuged vial. Minimum Testing Volume: 1.0 mL Plasma in 2 separate plastic vials Transport Temperature: Frozen Stability: Ambient: N/A Refrigerated : N/A Frozen: 14 days Causes for Rejection: Gross hemolysisGross lipemiaGross icterus


Report Available
4-Days


Clinical Significance
1230170176



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.