C-Peptide, Serum

Tube Type = Gold Top

Tube Type

Test ID LAB521
EPIC Order C-PEPTIDE
CPT Code(s) 84681
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station 30
Specimen Routine: 3 mL blood/gold SST top 
Stability Spun/Separated: Room Temperature: 8 hours
Refrigerated:  24 hours
Frozen: 30 days
Availability Routine: 24/7
Turnaround Time 2 hours
Reference Range Normal: 0.48-5.05 ng/mL
Comments  

Heterophilic antibodies can react in immunoassays to give falsely elevated or depressed results.  The Siemens Atellica IM CpS assay is used to measure C-Peptide and has been designed to minimize interference from heterophilic antibodies. 

Reviewed by J. Carr on January 13, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514