Protein C, Total Antigen
0030111
Ordering Recommendation
Not recommended for detecting protein C deficiency; preferred test is Protein C, Functional (0030113). Use to subtype deficiency in known protein C-deficient individuals. Do not order if individual has been on warfarin therapy in the previous 2-4 weeks.
Mnemonic
PROT C
Methodology
Enzyme Immunoassay
Performed
Sun-Sat
Reported
1-2 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. Non-frozen or hemolyzed specimens.  
Remarks
  
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months, at -70°C: 6 months  
Reference Interval
1-4 days: 17-53%
5-29 days: 20-64%
30-89 days: 21-65%
90-179 days: 28-80%
180-364 days: 37-81%
1-5 years: 40-92%
6-10 years: 45-93%
11 years and older: 63-153%  
Interpretive Data
Patients on warfarin may have decreased protein C values. Patients should be off warfarin therapy for two weeks for accurate measurement of protein C.  
Note
 
CPT Code(s)
85302
Components
Component Test Code*Component Chart Name
0030111Protein C, Total Antigen
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Protein C Antigen, Plasma
  • Protein C Immunologic