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Labcorp Oklahoma, Inc.
Test Directory


Index:

West Nile Virus Antibodies (IgG, IgM), Serum

Order Name WEST NILE
Test Number: 3609525
Revision Date 12/12/2022
Test Name Methodology LOINC Code
West Nile Virus Ab, IgG, Serum
Enzyme Immunoassay 38997-3 
West Nile Virus Ab, IgM, Serum
Enzyme Immunoassay 38166-5 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Serum Clot Activator SST Room Temperature
Instructions Specimen Type: Red-top tube or gel-barrier tube
Specimen Storage: Room temperature.
Specimen Collection: Not Available
Specimen Stability: Ambient: 16 days, Refrigerated : 16 days, Frozen: 16 days
GENERAL INFORMATION
Expected TAT 2-6 Days  
Clinical Use West Nile Virus is a flavivirus recently associated with an outbreak of encephalitis in the Eastern United States. West Nile Virus IgM is usually detectable by the time symptoms appear, but IgG may not be detectable until day 4 or day 5 of illness. Antibodies induced by West Nile Virus infection show extensive crossreactivity with other flaviviruses, including Dengue Fever Virus and St. Louis Encephalitis Virus. 
Performing Labcorp Test Code 138842 
Notes Labcorp Test Code: 138842
CPT Code(s) 86788, 86789
Lab Section Reference Lab