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Laboratory Test Directory

C-Peptide

Components

Name Method Department Units
C-Peptide Chemiluminescent Immunoassay
Core Lab, Endocrinology ng/mL

Specimen Requirements

Plasma Spun, Serum Spun

Container Type Container Size Specimen Volume
Preferred

Green tube (Lithium heparin), No Gel

3 mL 1 mL
Alternate

Gold tube, (SST) with Gel

3.5 mL 1 mL
Alternate

Red tube, (no anticoagulant), No Gel

3 mL 1 mL
Alternate

Green tube (Lithium heparin), with Gel

3 mL 1 mL
Stability

Room temperature - 24 hour(s)
Refrigerated - 24 hour(s)
Frozen - 1 week(s)

Specimen Preparation

  • Centrifuge within 1 hour, separate supernatant and freeze

Reasons for Rejection

  • Delayed or improper handling
  • Specimen collected in EDTA
  • Wrong collection tube
  • Capillary specimen

Comments

Samples must be separated and frozen within 1 hour of collection if not delivered to the laboratory within 1 hour of collection.

CPT Code

  • 84681