West Nile Virus Antibodies (IgG, IgM), CSF

Test Code

CSFWNV

Quest Code

36597

CPT Codes
86788, 86789

Preferred Specimen

2 mL CSF

Minimum Volume

0.7 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days

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

Gross hemolysis • Grossly icteric

Methodology
Enzyme Immunoassay (EIA)

Setup Schedule

Thurs

Report Available

7 days

Reference Range

West Nile Virus Ab (IgG), CSF	<1.30
West Nile Virus Ab (IgM), CSF	<0.90

Interpretive Criteria
West Nile Virus Antibody (IgG), CSF

<1.30	Antibody not detected
1.30-1.49	Equivocal
>1.49	Antibody detected

West Nile Virus Antibody (IgM), CSF

<0.90	Antibody not detected
0.90-1.10	Equivocal
>1.10	Antibody detected

Performing Laboratory

Quest Diagnostics - Great Lakes Region

Last Updated: February 19, 2024

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.