Cytomegalovirus Antibody, Serum or Plasma (IgG and IgM)Medically reviewed by WellAlly Editorial Team·Last reviewed August 16, 2026·[Editorial policy](https://wellally.tech/editorial-policy)
## Key facts at a glance
LOINC5122-7Short codeCMV Ab SerPl IF-aCncSynonymsCMV Ab SerPl IF-aCncCategorychemistrySampleserumContainerRed-top tube (SST)UnitsN/AFastingfalsePopulationadultSexallAge range18–65 yearsMethodifSpecimen volume5 mLStabilityRoom temperature: 4h, Refrigerated: 24h, Frozen: 7dHemolysis max500Lipemia max1000Icterus max500TAT4–24 hoursOrderroutine
## Why This Test Is Done


Doctors may order this test to evaluate exposure to CMV, especially in high-risk groups like pregnant women, organ transplant recipients, or those with weakened immune systems. It can also help diagnose or monitor CMV infection in certain conditions.


## What to Expect Before the Test


No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. The process takes a few minutes, and you may feel slight discomfort.


## What the Results Mean


Results typically show whether you have IgG, IgM, or both antibodies. IgG antibodies suggest past exposure, while IgM antibodies indicate a recent infection. Combined results help assess your immune response to CMV.


## Common Conditions Monitored


This test is often used to monitor CMV in people undergoing organ transplants, those with HIV/AIDS, or those with other immune deficiencies. It can also guide decisions during pregnancy to prevent congenital CMV infections.


## Clinical interpretation


How abnormal results are interpreted and what conditions they suggest.


### ◆Associated findings1

## Short name


CMV Antibody Panel


## Frequently asked questions
How long will I need to wait for my results?Results are usually available within 3–7 business days, depending on lab processing times. Your healthcare provider will contact you with the final report.Can I get false-positive or false-negative results?While rare, false results can occur due to lab errors or timing (e.g., testing too soon after exposure). Confirmatory testing may be needed if initial results are unclear.Does this test detect active CMV disease, or just past exposure?This test detects antibodies, which indicate past exposure or immune response, but does not directly measure active infection. Active CMV disease may require additional testing, such as viral load or PCR.
## Sources
3
1. 1MedlinePlus — Laboratory TestsSource
2. 2Lab Tests OnlineSource
3. 3Mayo Clinic — Tests & ProceduresSource


Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.


This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.


If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.


Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy