A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Protein C Activity

Test Code
PROTC


Alias/See Also
Protein C Functional


CPT Codes
85303

Preferred Specimen
Citrate BLUE (BLU)


Instructions
Collect whole blood in 3.2% buffered sodium citrate (9:1 blood to sodium citrate). Venipuncture must be atraumatic.


Specimen Stability
  • Centrifuge at 4,500 RPM (high) for 10 minutes. Plasma platelet count should be less than 10,000. Test within 4 hours of collection.
  • If testing is to be delayed more than 4 hours after collection, immediately separate plasma into a clean, polystyrene tube, cap and store below -20°C up to two weeks or -70°C up to 6 months.
  • In patients with hematocrit values greater than 55%, the citrate concentration must be adjusted so that a proper plasma/anticoagulant volume is maintained.


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Reject hemolyzed, clotted, overfilled tubes or short draw (<90%) samples


Methodology
Diagnostic Stago

Reference Range
1 day to 6 years:    17-65%
> 6 years:               70-130% 


Performing Laboratory
CRMC Laboratory



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.