Protein S Antigen, Free

Tube Type = Light Blue Top

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

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514