C-Peptide
Test Mnemonic
CPEPT
CPT Codes
- 84681 - QTY (1)
LOINC ®
1986-9
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Refrigerated |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 24 hours |
| Refrigerated | 7 days |
| Frozen | 30 days |
Days Performed
Mon - Fri
Turnaround Time
1 - 3 days
Methodology
| Name | Description |
|---|---|
| Electro Chemiluminescence Immunoassay (ECLIA) |
Reference Range
| C-peptide | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | 1.1 - 4.4 | ng/mL |
Special Info
Specimen collection should occur preferably from patients fasting for at least 8 hours and at minimum 8 hours after administration of multivitamins or dietary supplements, especially containing biotin (Vitamin B7).
Clinical Info
The assay is intended for use as an aid in the diagnosis and treatment of patients with abnormal insulin secretion.
Clinical Limitation
For diagnostic purposes, the results obtained from this assay should always be used in combination with the clinical examination, patient medical history, and other findings.