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Test Name

C-Peptide

CPT Code(s)

84681

Methodology

Immunoassay (IA)

Reference Range(s)

0.80-3.10 ng/mL

Clinical Significance

C-Peptide is useful in the evaluation of pancreatic beta cell function and for determining the source of insulin in patients with hyperinsulinemic hypoglycemia.

Alternative Name(s)

C-Terminal Insulin

To view specimen requirements and codes please Select a regional laboratory.

Not sure which laboratory serves your office? Call us 866-MYQUEST (866-697-8378)

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided 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 payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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C-Peptide
372