Cytomegalovirus IgG Antibody


  • EPIC Code:
  • IMO65
  • Soft Test Code:
  • CMVG
Alternate Names
  • CMV IgG

Specimen Collection & Preparation

Specimen Requirements

1.0 mL Serum in a SST Gold Top Tube

Alternate Specimen

1.0 mL Serum from a Red Top Tube in a Plastic Vial


2 days Refrigerated
30 days Frozen
(Do not use frost free units that undergo repeated freeze/thaw cycles)

Collection Instructions


Clinical Interpretation

Reference Range:

OD ratio <0.90 indicates no detectable Cytomegalovirus IgG antibody. No evidence of infection or immunity
OD ratio 0.91 - 1.09 is equivocal for Cytomegalovirus IgG antibody. Suggest a new specimen be collected and retested.
OD ratio > 1.10 is positive for Cytomegalovirus IgG antibody. In asymptomatic patients, including prenatal screens, a positive value is consistent with previous infection or immunity.
A single specimen is of limited diagnostic value in documentation of an acute or concurrent infection.

  • Enzyme Immunoassay (EIA)

Production Schedule

Sites Performed
  • Parkview Regional Medical Center
Days Performed
  • Immunology
Turn Around Time

7 days

Coding & Compliance



CPT Coding


Medical Necessity Documentation

Duplicate testing on this test is not acceptable per Medicare:  Testing to only be done every 365 days