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Test Name

Cytomegalovirus Antibodies (IgG, IgM)

CPT Code(s)

86644, 86645

Methodology

Immunoassay (IA)

Limitations

False-positive IgM test results may be due to the presence of heterophil antibodies or presence of rheumatoid factor.

Reference Range(s)

Cytomegalovirus Antibody (IgG)

≤0.90 Negative
0.91-1.09 Equivocal
≥1.10 Positive

Cytomegalovirus Antibody (IgM)
≤0.8 No antibody detected
0.9-1.0 Equivocal
≥1.1 Antibody detected

Clinical Significance

Intrauterine or congenital CMV infections occur in 0.5 to 2.2% of all live births. Symptomatic congenital infections usually occur in infants born to nonimmune mothers who have primary infections during pregnancy. Latency and reactivation of CMV influence the interpretation of serological  results. A single positive CMV IgG result is and indication of present or past infection. The presence of CMV IgM suggests a recent CMV exposure but does not differentiate between primary infection and reactivation.

Alternative Name(s)

CMV Antibody IgG, IgM,CMV IgG, IgM Abs

To view specimen requirements and codes please Select a regional laboratory.

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Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided 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 payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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2579
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6732 CMV G M AB
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Cytomegalovirus Antibodies (IgG, IgM)
6732