Protein S Antigen, Total and Free
Fasting Required: No

Lab: Quest Diagnostics

Specimen: Blood

Results: 7-10 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Description: Antigen testing is appropriate when a functional activity deficiency is present. If low, Total Protein S Antigen assesses the Protein S deficiency as either Type I or III (IIa). Type II (IIb) Protein S deficiency has normal concentrations of Total and Free Protein S Antigen.