Cytomegalovirus Antibody (IgG)

Message

SRHC Clients:

1 gold top tube or 1 red top tube
Transport to SRHC laboratory within 8 hours

Test Code

LAB467

Quest Code

403

Alias/See Also

CMV IgG AB

CPT Codes
86644

Preferred Specimen

1 mL serum (0.1 mL minimum)

Properly collected cord blood samples are acceptable

Minimum Volume

0.5 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated, stable 7 days

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

Index_____Interpretation
< or = 0.90: Negative - no CMV IgG Ab detected
_ 0.91-1.09: Equivocal
> or = 1.10: Positive - CMV IgG Ab detected
A positive result indicates that the patient has antibody
to CMV. It does not differentiate between an active or
past infection. The clinical diagnosis must be
interpreted in conjunction with the clinical signs and
symptoms of the patient.

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.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.