0081121
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C-Peptide, 24-Hour Urine

CPEP UR
Example Reports
Abnormal
Normal

Ordering Recommendation

Use to detect insulin secretion. Do not use to diagnose diabetes mellitus.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
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.

Unacceptable Conditions
Remarks
Stability

Ambient: 2 hours; Refrigerated: 7 days; Frozen: 1 month

Methodology

Quantitative Chemiluminescent Immunoassay

Performed

Sun-Sat

Reported

Within 24 hours

Reference Interval

14-156 µg/day

Interpretive Data

Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume.  For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.

Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

84681

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Components

Component Test Code* Component Chart Name LOINC
0020207 Creatinine, Urine - per volume 2161-8
0020208 Creatinine, Urine - per 24h 2162-6
0081122 C-Peptide, Urine ng/mL 55920-3
0096367 C-Peptide, Urine 24 Hour 27944-8
0097110 Total Volume 19153-6
0097111 Hours Collected 30211-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • 24 hr c-peptide
  • C-Peptide, Urine
  • Connecting peptide insulin
  • Insulin C-peptide
  • Proinsulin C-peptide
  • Urine C- peptide
C-Peptide, 24-Hour Urine