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Coagulation Factor XII Activity Assay

Test Code
F12


Alias/See Also
Factor XII


Preferred Specimen
1 mL platelet poor sodium citrate plasma


Minimum Volume
0.5 mL


Instructions
Submission of platelet poor plasma is critical to accurate results. Contact laboratory for further information.


Transport Container
Plastic vial


Transport Temperature
Frozen


Specimen Stability
Frozen 14 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, gross lipemia, gross icterus


Report Available
2-4 days


Reference Range
Adults: 55-180%


Clinical Significance
Factor XII deficiency is often discovered when activated partial thromboplastin time is found to be unexpectedly long. The deficiency causes no known bleeding disorder.




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.