Above the range
Common causes of a high C-Peptide
- Type 2 diabetes (insulin resistance)
- Insulinoma
- Renal failure
Looking for the other direction? See what causes a low C-Peptide.
All tests · Glucose & Diabetes · C-Peptide
Above the range
What causes a high C-Peptide?
Normal range 0.8-3.1 ng/mL (0.26-1.03 nmol/L SI). Specimen: Serum (fasting). See the full C-Peptide reference page for critical values and nursing considerations.
What is the normal range for C-Peptide?
The standard teaching reference range for C-Peptide is 0.8-3.1 ng/mL in conventional units, or 0.26-1.03 nmol/L in SI units. This value is measured in serum (fasting).
| Specimen | Serum (fasting) |
|---|---|
| Conventional range | 0.8-3.1 ng/mL |
| SI range | 0.26-1.03 nmol/L |
| Panel | Glucose & Diabetes |
Full details, including nursing considerations, on the C-Peptide normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Same panel