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Test Code CMGA Cytomegalovirus (CMV) IgG Avidity Testing

Additional Codes

Epic Ordering Code LAB467
NBS code LBC13344
Service code 31851

Specimen Requirements

Submit only one of the following:

Preferred: Acceptable:
Yellow Top Red Top

Processing Requirements

Allow specimen to clot for 30 mins and centrifuge within 2 hours

Specimen type: Serum

Volume: 0.5mL

Specimen Stability

Specimen type Serum
Ambient 3 days
Refrigerate 2 weeks (preferred)
Frozen 1 year

Specimen Condition

Gross Haemolysis Reject
Icterus OK
Lipaemia OK
Others Not applicable

Methodology

Chemiluminescent Immunoassay

Days and Times Performed

Monday, Wednesday, Friday, TAT 2 - 4 days

Reference Interval

< 50.0% Avi:             Low Avidity

50.0 – 59.9% Avi:     Grayzone

≥ 60.0% Avi:             High Avidity

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

To aid in the diagnosis of cytomegalovirus (CMV) infection during pregnancy after initial testing for CMV IgM and IgG has been performed.

Update

Last updated 26/07/2026

LOINC Code Information

Cytomegalovirus antibody, IgG 13949-3
Cytomegalovirus antibody, IgM 24119-0
Cytomegalovirus (CMV) IgG Avidity 78445-4

Alias

Cytomegalovirus Antibody

IgG Avidity