ARUP's Laboratory Test Directory

C-Peptide, 24-Hour Urine : 0081121

Mnemonic: CPEP UR

Ordering Recommendation: Use to detect insulin secretion. Do not use to diagnose diabetes mellitus.
Methodology: Quantitative Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: 24-hour urine. Refrigerate during collection. Also acceptable: Random urine (no reference intervals).

Specimen Preparation: Transfer 2 mL aliquot from a well-mixed 24-hour urine to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Stability (collection to initiation of testing): Ambient: 2 hours; Refrigerated: 24 hours; Frozen: 1 month
Reference Interval:
14-156 µg/day
CPT Code(s): 84681