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C PEPTIDE
Test CodeCPEPT
CPT Codes
84681
Preferred Specimen
1 Gold tube (gel separator)
Minimum Volume
0.5 mL
Instructions
Centrifuge for complete separation of serum and red cells. Separate and refrigerate or freeze until tested.
Transport Temperature
Refrigerate or freeze
Specimen Stability
- 2-8°C up to 24 hours
- Otherwise freeze
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
- Improper storage temperature
- Hemolysis >250 mg/dL hemoglobin
Methodology
Chemiluminescent Immunoassay
Setup Schedule
M, T, W, Th, F, Sa, Sun
Report Available
Within 24 hours of receipt at the performing laboratory.
Reference Range
0.81 - 3.85 ng/mL
Clinical Significance
C-peptide is useful in the evaluation of pancreatic function since it gives a direct evaluation of beta cell function in the pancreas. This test is useful in the management of diabetes and can differentiate Type 1 from Type 2 diabetes mellitus (DM).
Performed By
Alverno Laboratories
Performing Laboratory
Alverno Central Lab
NCHB3 (Chemistry, Centaur)
Last Updated: June 7, 2023