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Cytomegalovirus (CMV) Antibody, Qualitative (Serum/Plasma)

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

This test checks for the presence of antibodies against cytomegalovirus (CMV), a common virus that can affect the immune system.

Quick summary

["Determines if your body has developed immunity to CMV through prior infection or vaccination."]

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

Key facts at a glance

LOINC
74242-9
Short code
HEDIS 2014-16 CMV Ab
Synonyms
HEDIS 2014-16 CMV Ab
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a weakened immune system (e.g., due to HIV, chemotherapy, or organ transplant), are pregnant, or are considering organ transplantation. It may also be used to screen for CMV infection in certain high-risk groups.

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 painless.

What the Test Results Mean

A positive result means your body has detected CMV antibodies, suggesting past infection or immunity. A negative result indicates no detectable antibodies, meaning you may not have immunity yet or have never been exposed.

Common Uses and Considerations

Positive results help guide treatment decisions, especially in high-risk patients. False negatives are rare but possible if testing occurs too soon after exposure. False positives can occur in rare cases but are less common.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

CMV antibodies are critical for monitoring immune status in patients at high risk for CMV-related complications, such as organ transplant recipients or those with advanced HIV. Early detection can inform preventive measures or targeted therapy to reduce infection risks.

Short name

CMV Antibody Test (Qualitative)

Frequently asked questions

What does a positive result mean for my health?
A positive result means your body has likely been exposed to CMV at some point, which may provide protection against future infections. However, if you have a weakened immune system, you may still need additional precautions or monitoring.
Can I get this test at home?
No, this test is typically performed in a clinical laboratory using a blood sample drawn by a healthcare professional. Home testing kits for CMV antibodies are not standard.
How soon will I get my results?
Results are usually available within 1–3 business days, depending on lab processing times. Your healthcare provider will discuss the results with you.
  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