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Test Code CPEP/ LAB521 C-Peptide

Performing Laboratory

Asante Rogue Regional Medical Center

Specimen Requirements

Patient should be fasting

Yellow (Gold) top tube (SST)

Specimen Transport Temperature and Stability

  • Centrifuge collection tube and refrigerate within 2 hours of collection
  • Spun SST stable 48 hours at  2° to 8° C
  • Separate and freeze if testing to be delayed

Specimen Minimum Volume

0.5 mL

Reasons for Rejection

Hemolysis

Quantity not sufficient (QNS)

Lack of Two Patient Identifiers:

         1-Patient’s First & Last name 

         2-Patient’s Date of Birth

Day(s) Test Set Up

Performed Monday-Friday; AM Shift 

Additional Information

Useful in the determination of endogenous insulin secretion, and in the diagnosis of insulinoma.

Methodology

Chemiluminescence (CLIA)

Performing Department

Chemistry

Test Classification and CPT Coding

84681 

C-peptide

Billing Code

2071660