Protein S Antigen, Total

Message

Collect a full tube, following standard venipuncture techniques.

Test Code

LAB493 PRSTA

Alias/See Also

PRSTA

CPT Codes
85305

Includes

@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@

Instructions

Processing Instructions (Lab use only): Centrifuge light blue-top tube for 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcL). Freeze immediatelyMinimum Testing Volume: 0.5 mL Platelet-poor plasma Transport Temperature: Frozen Stability: Ambient: N/A Refrigerated : N/A Frozen: 30 Days Causes for Rejection: Hemolysis Received room temperature Received Refrigerated Received thawed

Report Available

3-Days

Clinical Significance

1230170800

Last Updated: May 18, 2026

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.