Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

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

C4 BINDING PROTEIN

ORDERING INFORMATION:
Sunquest Test Code:
C4BP      Geisinger Epic Procedure Code: 86329.02         Geisinger Epic ID: 21188

SPECIMEN COLLECTION
Specimen type:
Serum
Preferred collection container:
Specimen required:
1 mL aliquot of serum; minimum 0.5 mL. Please submit a separate frozen aliquot for this test. It may not be combined with any other test requiring a frozen aliquot.

SPECIMEN PROCESSING
Specimen processing instructions:
Allow to clot. Centrifuge and immediately separate serum specimens from the cells into clean, plastic, screw-capped vial(s). Ship specimens frozen on dry ice to ensure sample integrity. Do not thaw. 
Transport temperature:
Frozen.
Specimen stability:
Room Temperature: Unacceptable. Refrigerated: Unacceptable. Frozen: 1 month.
Rejection criteria:
Room temperature or refrigerated specimens.

TEST DETAILS
CPT code(s):
86329
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:
C4 binding protein, serum.
Methodology:
Radial Immunodiffusion
Synonyms:
Quest test code 11335
Clinical significance:
Clinical Significance C4 binding protein is a control factor in classical complement pathway activation. It binds to protein S and low levels of C4 binding protein have been found associated with thrombosis in some patients with SLE.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: Tuesday, Thursday. Report available 4 days.    
Performed stat? No
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