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Department of Health Services

Public Health Regional Laboratory

West Nile Virus


Please note that this test is no longer performed in-house. All specimens received will be forwarded on to CDPH for testing and MUST include a completed requisition form and case history form (see below).


IgM and IgG serology

CPT Code

86788 - IgM
86789 - IgG

Specimen Type

2 mLs of serum

1-2 mLs of CSF if lumbar puncture is performed

Specimen Storage

Store specimens in the refrigerator (2-8ºC).

Specimen Transport

Transport specimens to the laboratory on cold pack.


Reports will be available in approximately 14 days.

Case History Form

West Nile virus Infection Case Report  (PDF: 108 Kb)

Lab Slip

West Nile virus Specimen Submittal Form(PDF: 108 Kb)