Versiti - Diagnostic Laboratories Test Menu


Protein S Antigen, Total and Free

Order Code: 1042 Get Requisition Form
Test Information Icon
Test Information
This test provides the antigen level of the blood coagulation factor, Protein S. This protein is one of the regulatory proteins in the blood clotting cascade.
Also Known As Icon
Also Known As
  • Protein S
  • PS Ag
  • PS Antigen
Test Type Icon
Test Type
Functional/Serologic Test
Sample Notes Icon
Sample Notes
Citrated Plasma (light blue top)
Requested Volume Icon
Requested Volume
2 aliquots of 1ml each
Minimum / Pediatric Volume Icon
Minimum / Pediatric Volume
2 aliquots of 1ml each
Additional Sample Information Icon
Additional Sample Information
Patient should be off warfarin for at least 2 weeks before drawing sample.
Shipping Information Icon
Shipping Information
CPT Codes Icon
CPT Codes
  • 85305
  • 85306
Method Icon
Microlatex Particle - Mediated Immunoassay
Turnaround Time Icon
Turnaround Time
7-10 days
New York State Approval Icon
New York State Approval
DEX Z-Code™ Icon
DEX Z-Code™
Diagnostic Laboratories
Diagnostic laboratory services including HLA testing, donor testing, immunohematology reference lab testing, hematology testing and more.
Hematology Testing
Versiti provides von Willebrand factor tests, aHUS diagnosis, hemophilia lab tests and other laboratory diagnosis of bleeding and clotting disorders.
Our Experts
Research investigators, postdoctoral fellows and laboratory staff at Versiti Blood Research Institute and Diagnostic Laboratories.
Access requisitions for Versiti Diagnostic Laboratories.