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Cytomegalovirus IgG Antibody, Serum (Quantitative)

Published: August 9, 2026Updated: August 16, 2026

This test checks for antibodies to the cytomegalovirus (CMV), a common virus that can affect people of all ages. Antibodies indicate past or current infection.

Quick summary

["Your body’s immune response to CMV may help protect you from future infections."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
110872-9
Short code
CMV IgG Msmt CSF
Synonyms
CMV IgG Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms of CMV infection, such as fatigue, fever, or organ-related issues, or if you’re at higher risk—like pregnant women, people with weakened immune systems, or those undergoing organ transplants. It can also help confirm a diagnosis or monitor treatment progress.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The test is quick and typically done in a lab setting.

What the Results Mean

Positive results show the presence of CMV antibodies, suggesting past infection or immunity. Negative results mean no detectable antibodies, which could indicate no prior exposure. Results alone don’t confirm active infection—additional testing may be needed.

Common Reasons for Testing

CMV IgG tests are often used to screen for immunity before procedures like organ transplants, assess exposure in high-risk patients, or evaluate immune function in chronic illnesses.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Understanding Your Results

Short name

CMV IgG Antibody

Frequently asked questions

How long does it take to get my test results?
Results are usually available within 1–3 business days, depending on lab processing times. Your doctor will discuss them with you during your follow-up visit.
Can I have a false-positive or false-negative result?
While rare, false results can occur due to lab errors or timing (e.g., testing too soon after exposure). If your results are unclear, your doctor may repeat the test or order additional tests for clarity.
Does this test show if I currently have an active CMV infection?
No, this test only detects antibodies, which indicate past infection or immunity. To check for active infection, your doctor may recommend a different test, such as viral load testing or PCR.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo 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