Cytomegalovirus Antibody (IgG)

Test Code

403

CPT Codes
86644

Preferred Specimen

1 mL serum collected in a serum separator tube (SST®)

Minimum Volume

0.5 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic • Grossly icteric

Methodology
Immunoassay (IA)

Setup Schedule

Set up: Mon, Wed, Fri a.m.; Report available: Next day

Limitations

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

Reference Range

U/mL	Interpretation
<0.60	Negative
0.60-0.69	Equivocal
≥0.70	Positive

A positive result indicates that the patient has antibody to CMV. It does not differentiate between an active or past infection.

Clinical Significance

CMV infections are common and usually asymptomatic. In patients who are immunocompromised, CMV may cause severe disseminated disease. CMV may cause birth defects in a minority of infected newborns. CMV IgG antibodies may represent prior exposure or recent infection.

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.