Vanderbilt Pathology Laboratory Services
Test Directory
C-PEPTIDE (PEP)
Department: Esoteric ChemistryTest Synonym(s): PEP
CPT Codes: 84681
Methodology: Chemiluminescent Immunoassay
Reference Range: 0.9-7.1 ng/mL
Tube Type: Red top SST (Clot activator with gel) or red top (no gel)
Specimen: Serum or plasma (heparin)
Alternate Specimen: Dark green top (Lithium Heparin)
Pediatric Requirements: 1 red microtainer
Volume: 5 mL
Minimum Volume: 0.5 mL
Temperature: Must be spun in refrigerated centrifuge and separated.
Stability: Refrigerated: 4 hours, frozen: 3 months
Reasons for Rejection: QNS, EDTA plasma
Days Performed: Monday - Friday
Times Performed: 8:00 a.m. - 2:00 p.m.
TAT: 1 day
Special Instructions: Specimen should be separated using refigerated centrifuge
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