0.5 to 2.0 ng/mL (nanograms per milliliter)
Normal ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results mean
C-peptide values are interpreted based on the blood sugar level. C-peptide is a sign that the body is producing insulin. Low values (or no insulin C-peptide) indicate that your pancreas is producing little or no insulin.
Review Date: 04/19/2010
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns Hopkins School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.