Neopterin, Serum

Test Code

Neopterin

Quest Code

93917

CPT Codes
83520

Preferred Specimen

0.8 mL serum protected from light

Minimum Volume

0.3 mL

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube protected from light

Instructions

Collection tubes should be protected from light. If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic amber/protected from light transport tube.

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: Unacceptable
Refrigerated: 72 hours
Frozen: 6 months

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

Not light protected

Methodology
Immunoassay (IA)

FDA Status
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.

Setup Schedule

Sets up 1 day a week.

Reference Range

Adults

<2.5 ng/mL

Clinical Significance

Increased levels of neopterin are found during impaired renal function and viral infections in transplant patients. Elevated levels are also indicators for conditions related to impaired cellular immunity.

Performing Laboratory
LabCorp of America
1447 York Court
Burlington, NC 27215-3361

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.