C-Peptide *

SIM

LAB521

CPT

84681 

Synonyms

Connecting peptide; Insulin C-peptide; Proinsulin C-peptide 

Specimen Type

Serum 

Container

Red-top or gold-top tube

Collection Instructions

None

Volume

0.8 mL  
Minimum volume: 0.3 mL

Additional Information

The principle use of C-peptide is in the evaluation for hypoglycemia. C-peptide levels are increased with renal failure.

Patient Preparation

Patient should fast for 14-16 hours for basal values

Specimen Processing Instructions

If a red-top tube is used, transfer separated serum to a plastic transport tube. Avoid hemolysis.

Transport Requirements

Refrigerate

Specimen Stability

Refrigerated (or frozen) 14 days 

Rejection Criteria

Citrated plasma specimen

Reference Range

Reference Range accompanies report

Critical Value

Test Includes

C-peptide 

Methodology

Electrochemiluminescence immunoassay (ECLIA)

Testing Frequency

LCA

010108 

Reviewed By

Rhonda Crowe    

Reviewed Date

01/27/2023

Supplemental

*  Denotes Reference Lab test