Hepatitis A Virus Antibody, Total (IgG + IgM) – Immunoassay
This blood test checks for antibodies against the hepatitis A virus, which helps determine if you’ve been exposed to the virus or if your body has developed immunity.
["Helps identify past or current hepatitis A infection or immunity status."]
Key facts at a glance
- LOINC
- 39302-5
- Short code
- FLUAV H15 Ab Titr Ser HAI
- Synonyms
- FLUAV H15 Ab Titr Ser HAI
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- hai
- 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 doctor may order this test if you have symptoms of hepatitis A, such as fever, fatigue, nausea, or jaundice. It may also be used to screen for hepatitis A in people with risk factors, like recent travel to areas with high infection rates, exposure to someone infected, or certain occupational hazards. Additionally, it can confirm immunity after vaccination or diagnose recent infection.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into a vein in your arm to draw blood. If you’re nervous, let your healthcare provider know so they can help make it more comfortable.
What the Test Results Mean
Positive results for IgM antibodies indicate an active infection (recent exposure). Positive IgG antibodies suggest past infection or immunity. A combination of both may mean you had the infection and developed immunity. Negative results mean you likely haven’t been exposed recently or have no immunity.
Common Causes of Abnormal Results
False negatives can occur if tested too early after exposure. False positives are rare but may happen with other viral infections or certain medications. If results are unclear, your doctor may repeat the test or order additional tests.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Hepatitis A Antibody Test
Frequently asked questions
Can I get hepatitis A if my test is negative?
What does it mean if I have IgM antibodies?
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