Jan 30, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry


C-Peptide (XCPEP) Chemistry Lab Test

Name: C-Peptide

Test Name: C-Peptide

Health Link Test Code: XCPEP

LIS Test Code: CPEP

CPT Code(s): 84681

Methodology: Chemiluminescent Immunoassay

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: Not available stat.

Specimen: Blood

Collection Container: Red cap with yellow ring (SST)

Also Acceptable: Red top

Collection Volume: 3 mL

Pediatric Collection Volume: 1 mL

Stability Ambient:

24 hours

Stability Refridgerated:

48 hours

Stability Frozen:

>48 hours

Sample Analyzed: Serum

Testing Volume: 1 mL

Pediatric Testing Volume: 0.3 mL

Specimen Processing:

Centrifuge. If a complete barrier has not formed, transfer cell-free serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.


0 days and up: 1.8-5.2 ng/mL

C-Peptide reference interval established for fasting adults.

Interpretation Type: Reference Interval