Cytomegalovirus Antibody (IgG)

Message

Performed in the Chemistry Laboratory x5820.
05.2019

Test Code

CMVG

CPT Codes
86644

Preferred Specimen

Serum collected in a serum separator tube (SST®)

Minimum Volume

0.5 mL of blood

Transport Temperature

Room temperature

Specimen Stability

Refrigerated: 7 days
Frozen: Indefinite; no specific expiration time established

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

Gross hemolysis • Gross lipemia • Bacterially contaminated specimens

Methodology
Chemiluminescent immunoassay (CLIA). Performed on the Liaison XL.

Setup Schedule

This assay is performed at least twice per week.

Limitations

Test indicates past exposure, not presence of active infection with circulating virus. Specimens taken early during the acute phase of infection may not contain detectable levels of IgG antibodies

Reference Range

Results are reported as Negative, Equivocal, or Positive. Equivocal results were repeated and confirmed at the border between Negative and Positive.

Clinical Significance

CMV infections are common and usually asymptomatic. In patients who are immunocompromised, CMV may cause disseminated, severe disease. CMV may cause birth defects in a minority of infected newborns. Antibody IgG may represent prior exposure or recent infection if there is a significant change in titer between acute and convalescent specimens.

Performing Laboratory
Tufts Medical Center Clinical Chemistry Laboratory

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.