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Test Name

Rubella Antibody (IgM)

CPT Code(s)

86762

Methodology

Immunoassay

Reference Range(s)

<0.90 Negative
0.90-1.09 Equivocal
≥1.10 Positive

Clinical Significance

Rubella is an acute exanthematous viral infection of children and adults. Rash, fever and lymphadenopathy characterize the illness. While many infections are subclinical, this virus has the potential to cause fetal infection with resultant birth defects. In the absence of a current or recent infection, a demonstration of specific IgG on a serum sample is evidence of immunity to rubella. A positive rubella IgM result does not necessarily indicate current or recent infection. Without a history of exposure to rubella or symptoms consistent with rubella, the IgM result may be difficult to interpret. Rubella IgM can be false positive due to other causes (e.g., parvovirus, rheumatoid factor, cytomegalovirus). Rubella IgM may also persist for more than 12 months after vaccination or natural infection. For a serologic diagnosis of congenital rubella in the neonatal period, antibody to rubella virus should be measured in both infant and maternal sera. If IgM is detected in a newborn infants serum, it is probable that transplacental rubella infection has occurred.

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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.

53355P
4422X
4422
4422
4422
4422
53355R
4422
4422X
4422X
29055
4422
4422
4422
2475
4422
4422
4422
13342
4422
4422
4422
4422X
4422X
4422X
4422X
4422X RUBM
RUB ABM
4422
4422X
4422X
29055
4422
4422
4422
Rubella Antibody (IgM)
4422