C peptide
This test measures the level of C-peptide in a sample of your blood or urine (pee). C-peptide is a chain of amino acids (the building blocks of proteins) that your pancreas makes in the process of making insulin. Insulin is a hormone that your pancreas makes to help blood glucose (blood sugar) get into your cells, where it can be used for energy.
Source: MedlinePlus, U.S. National Library of MedicineNormal range
4 published ranges, each from a named source 0.83.1 ng/mL drawn: all ages · American Board of Internal Medicine (Laboratory Test Reference Ranges)
- Normal
- 0.5–4.4 ng/mL (varies by lab)ABIM 0.8–3.1 · ARUP 0.5–3.3 · Mayo 1.1–4.4 ng/mL
These labs do not agree: the published adult ranges differ by up to 2.2×, so the same result can read as normal at one lab and be flagged at another — ABIM 0.8–3.1 · ARUP 0.5–3.3 · Mayo 1.1–4.4 ng/mL. Both are real published values, shown as each lab states them.
Ranges from ARUP Laboratories Test Directory, American Board of Internal Medicine (Laboratory Test Reference Ranges), Mayo Clinic Laboratories (Pediatric Test Catalog), Mayo Clinic Laboratories (Test Catalog).All source ranges (4)
| Source | Sex | Age | Range |
|---|---|---|---|
| American Board of Internal Medicine (Laboratory Test Reference Ranges) | All | all ages | 0.8–3.1 ng/mL |
| ARUP Laboratories Test Directory | All | all ages | 0.5–3.3 ng/mL |
| Mayo Clinic Laboratories (Pediatric Test Catalog) | All | all ages | 1.1–4.4 ng/mL |
| Mayo Clinic Laboratories (Test Catalog) | All | all ages | 1.1–4.4 ng/mL |
What an abnormal result can be associated with
- A high result
- Elevated circulating C-peptide concentration
- A low result
- Decreased circulating C-peptide concentration
details
- Sample
- Serum or plasma · LOINC
- Listed under
- Hypoglycemia
- Code
- LOINC 1986-9 · ng/mL
- Also known as
- Pept
See your own C peptide Add a lab report and it is drawn against your lab's range, over time. Upload a Blood Test