Protein S Antigen, Free

Tube Type

Test ID		LAB492
EPIC Order		PROTEIN S ANTIGEN, FREE
CPT Code(s)		85306
Group/Individual Test		Individual
Laboratory		Special Coagulation
Tube Station		30
Specimen	Routine:	3.0 mL blood/light blue sodium citrate tube; See Comments
Stability		Unspun - 4 hrs Room Temp - 4 hrs Refrigerated - NO Frozen - 6 months
Availability	Routine:	2 runs/week; Monday and Thursday
Turnaround Time		3-5 Business Days
Internal Reference Testing & Outreach Handling Instructions		Platelet poor plasma (double spun). Aliquot and freeze within 4 hours.
Reference Range	Normal:	54.7-146.1%
Comments	Deliver Immediately

Reviewed by J. Carr on January 14, 2026