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HelpTest Code CPEP C-Peptide
Additional Codes
| Epic Ordering Code | LAB521 |
| NBS code | LBC13343 |
| Service code | 31869 |
Specimen Requirements
Submit the following:
| Container: |
| Yellow Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 48 hours |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | |
|---|---|
| 0 – < 1 yr | 70 – 1,448 pmol/L |
| 1 – 5 yrs | 116 – 1,477 pmol/L |
| 6 – 18 yrs | 257 – 2,241 pmol/L |
| ≥ 19 yrs | 260 – 1,729 pmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of B-cell function in insulin dependent diabetes.
Aids in differential diagnosis of hypoglycaemia (factitious hypoglycaemia, insulin autoimmune hypoglycaemia and insulinoma).
Update
Last updated 16/07/2026
LOINC Code Information
14633-2