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Neopterin, Serum
Test Code93917
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
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.
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.