Western Equine Encephalitis Virus Antibody, IFA (Serum)

Test Code

CPT Codes
86654 (x2)

Preferred Specimen
1 mL serum

Minimum Volume
0.2 mL

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Immunofluorescence Assay (IFA)

Setup Schedule
Sets up 5 days a week.

False-positive results may be produced if the patient has been immunized against yellow fever or if the patient has had previous infections that produce similar, cross-reacting antibodies.

Clinical Significance
IgG titers ≥1:16 suggest exposure (either past or recent), while the presence of IgM indicated recent infection.

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.