C PEPTIDE

Test Code

LAB8415 (MISCELLANEOUS)

CPT Codes
84681

Preferred Specimen

1 Gold tube (SST)

Patient Preparation
None

Minimum Volume

0.5 mL (1 mL optimal)

Instructions

Centrifuge for complete separation of serum from red cells. Refrigerate or freeze until testing.

Transport Container

Gold tube

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

As received; STAT testing not available

Report Available

Report same day received

Reference Range

0.81-3.85 ng/mL

Clinical Significance

C-peptide is useful in the evaluation of pancreatic funciton since it gives a direct evalutation 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).

Performing Laboratory
Alverno Central Laboratory

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.