Mumps Virus IgG Antibody Index (Serum)
This test measures the level of antibodies against the mumps virus in your blood. Antibodies are your body’s natural defense against infections.
["This test helps determine if you’ve been exposed to mumps or if your immune system has developed protection against it."]
Key facts at a glance
- LOINC
- 77398-6
- Short code
- Mumps virus IgG.Ab index Pnl Ser
- Synonyms
- Mumps virus IgG.Ab index Pnl Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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 Is Done
Your healthcare provider may order this test if you’ve had symptoms of mumps (such as swollen salivary glands, fever, or fatigue) or if you’ve been exposed to someone with mumps. It can also be used to check if you’re immune before certain vaccinations or procedures.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process usually takes a few minutes. If you’re nervous, let your healthcare provider know—they can offer ways to make it more comfortable.
What the Results Mean
An elevated index suggests you have mumps antibodies, meaning your body has likely been exposed to the virus or vaccinated. A low or absent index may indicate no prior exposure or immunity. Your results will be discussed with you by your healthcare provider.
Common Causes of Abnormal Results
A high index is most commonly linked to past mumps infection or vaccination. Rarely, false positives can occur, especially if you’ve had other viral infections. If your results are unclear, follow-up testing may be needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test plays a key role in diagnosing mumps in adults or children who suspect exposure, especially if symptoms are mild or unclear. It can also confirm immunity before certain medical procedures or vaccinations. If you test positive, your provider may recommend monitoring for complications or further treatment if needed.
Short name
Mumps IgG Index
Frequently asked questions
Will this test show if I have mumps right now?
Can I get this test at home?
How long does it take to get results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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