C-Peptide, LCMSMS (Client 56847, 58097, 58739 and 58374)

Test Code

94575

CPT Codes
84681<br /> *** RESTRICTED USE *** This code is available for Client 56847, 58097, 58739 and 58374, 58747, ONLY.

Preferred Specimen

0.5 mL serum

Patient Preparation
Overnight fasting is required

Minimum Volume

0.3 mL

Instructions

Collect blood samples observing routine precautions for venipuncture. Allow serum samples to clot completely before centrifugation. Refrigerate after centrifugation.

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Hemolysis • Received room temperature

Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

P.M.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.