Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  

PROTEIN C FUNCTIONAL

ORDERING INFORMATION:
Sunquest Test Code:
PROTC      Geisinger Epic Procedure Code: 85303.01         Geisinger Epic ID: 17588

SPECIMEN COLLECTION
Specimen type:
Platelet-free plasma
Preferred collection container:
Alternate Collection Container:
Other size blue-top (3.2% sodium citrate) tubes (e.g., 1.8 mL, 4.5 mL)
Specimen required:
Two (2) 1 mL aliquots plasma
Special notes:
Do not draw blood from a heparinized line. Avoid contaminating the sample with tissue thromboplastin or heparin. Venipuncture must be performed with no trauma. Hemolyzed samples are not acceptable. If blood is drawn from an indwelling catheter, flush with 5 mL of saline and discard the first 5 mL of blood collected.
Patient preparation:
Patient must be off heparin 48 hours prior to testing. Patient must be off Coumadin 2 weeks prior to testing.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge the citrated blue-top tubes as soon as possible (within 60 minutes) at designated time and speed to obtain platelet-poor plasma (<10,000/µL). Using a plastic pipette, remove 1 mL of plasma and transfer to a plastic aliquot tube and label with patient's name and a second patient identifier (e.g., date of birth, medical record number). 
Transport temperature:
Frozen.
Specimen stability:
Room temperature: 8 hours. Frozen: -20°C for 30 days, -70°C for 6 months.
Rejection criteria:
Clotted specimen.

TEST DETAILS
Reference interval:
75-135%.
CPT code(s):
85303
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Functional protein C level.
Methodology:
Chromogenic
Synonyms:
Functional Protein C
Clinical significance:
Deficiency of protein C is a risk factor for venous thrombosis. Acquired deficiencies are found in patients receiving warfarin therapy, with liver disease, vitamin K deficiency, DIC, surgery and trauma.
Doctoral Director(s:)
Michelle Grant DO    
Review Date: 04/29/2019

Performing Locations

Geisinger Medical Center

Performing laboratory: Coagulation
Technical Lead: Margaret Knowles-Tuchman
Frequency: Daily, first shift
Performed stat? No
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