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Test Code LAB5101 C-PEPTIDE

Important Note

Fasting specimen recommended.

Additional Codes

For Labcorp 501573, order this test along with Lab5933 (Glutamic Acid Decarboxylase (GAD65) Antibody Assay, Serum)  and Insulin Autoantibodies (IAA)

Specimen Type

Preferred Sample: Lithium Heparin Tube (Mint Green Top, Dark Green Top)
Alternative Sample: Serum (SST, Gold, Tiger, Red Top Tube-no gel)

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily

Sample Stability

Room temp: 24 hours

Refrigerated: 48 hours
Frozen: 3 months

Method

Chemiluminescent Microparticle Immunoassay (CMIA)

Reference Ranges

C-Peptide: 0.78-5.19 ng/mL

Critical Values: None

 

Reporting Limit

Reporting Range: 0.03-30.0 ng/mL

Synonyms

CPEP, Connecting peptide of insulin, LAB5101, PC Peptide, Proinsulin C Peptide

CPT Codes

84681

Collection Instructions

Fasting specimen recommended.

Interference

Hemolysis: 500mg/dL

Icterus: 20 mg/dL

Lipemia: 5000mg/dL