Hepatitis A Virus Antibody, Total (IgM and IgG) – 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.
["This test helps assess past infection or immunity to hepatitis A virus."]
Key facts at a glance
- LOINC
- 39301-7
- Short code
- FLUAV H14 Ab Titr Ser HAI
- Synonyms
- FLUAV H14 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 healthcare provider may recommend this test if you have symptoms of hepatitis A, such as fatigue, nausea, abdominal pain, or jaundice. It may also be used for screening before certain procedures, to evaluate liver function, or to confirm immunity after vaccination.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re concerned about needles, let your provider know so they can discuss alternatives.
What the Test Results Mean
Positive results for IgM antibodies suggest recent infection, while IgG antibodies indicate past infection or immunity. Both types together may be present if you’ve recovered from hepatitis A. Negative results mean no detectable antibodies at this time.
Common Reasons for Testing
This test is often used to diagnose hepatitis A, check for immunity after vaccination, or screen for exposure in high-risk groups (e.g., travelers, healthcare workers, or those with liver disease).
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
IgM antibodies appear shortly after infection and fade as your body clears the virus. IgG antibodies develop later and can last for years, providing long-term immunity. High levels of these antibodies may signal active infection or recent exposure, while low or absent levels suggest no current immunity or exposure. This test is critical for early diagnosis and guiding treatment or preventive measures.
Short name
Hepatitis A Antibody Test
Frequently asked questions
What does it mean if my test shows IgM antibodies?
What if my test shows only IgG antibodies?
Can I get hepatitis A if my antibody test is negative?
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