Varicella Zoster Virus (VZV) Antibodies, Quantitative, IgM

CPT: 86787
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Test Details


  • VZV IgM


Detect IgM antibodies specific for VZV. These IgM antibodies, if present, can help confirm a diagnosis of VZV acute infection. The IgM response to VZV can be detected at seven days postinfection and usually peaks at 14 days. If a patient presents more than nine days after the appearance of a rash, this assay should not be used. (See Varicella Zoster Virus (VZV) Antibodies, IgG [096206]).


Enzyme immunoassay (EIA)

Reference Interval

• Negative: <0.91 index

• Borderline: 0.91−1.09 index

• Positive: >1.09 index

Specimen Requirements




1 mL

Minimum Volume

0.5 mL


Red-top tube or gel-barrier tube

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements



Room temperature

14 days


14 days


14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Hemolysis; lipemia; gross bacterial contamination; plasma samples


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
096776 Varicella-Zoster Ab, IgM 5404-9 096778 Varicella-Zoster Ab, IgM index 5404-9

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