Protein S Activity

Test Code
LAB491


CPT Codes
85305

Preferred Specimen
Blue sodium citrate


Minimum Volume
0.5 mL


Transport Temperature
Frozen


Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen -20ºC: 30 days
Frozen -70ºC: 1 year


Methodology
Clot Detection



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.