Cytomegalovirus (CMV) Antibodies, Qualitative, IgM

CPT: 86645
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Special Instructions

Acute and convalescent specimens must be submitted on separate request forms.

Expected Turnaround Time

1 - 2 days

Related Documents

Specimen Requirements




0.5 mL

Minimum Volume

0.2 mL


Red-top tube or gel-barrier tube

Storage Instructions

Room temperature

Stability Requirements



Room temperature

14 days


14 days


14 days

Freeze/thaw cycles

Stable x4

Causes for Rejection

Hemolysis; lipemia; gross bacterial contamination; grossly icteric; visible particulate matter

Test Details


Aid in the diagnosis of acute primary infection


IgM responses may persist for weeks to months postinfection. Low levels of IgM may be detectable during reactivation of infection. This test is intended for qualitative determination only. The numeric value of the final result above the cutoff is not indicative of the amount of CMV IgM antibody present.


Chemiluminescent immunoassay (CLIA)

Reference Interval

Negative: <30.0 AU/mL

The equivocal sample should be retested. In case the result remains in this range after repeat testing, a second sample should be collected.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
096727 Cytomegalovirus (CMV) Ab, IgM 5126-8 096730 Cytomegalovirus (CMV) Ab, IgM AU/mL 5126-8

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