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Hepatitis A Virus Antibody, Total (IgG + IgM) - Serum

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

This test checks for antibodies against the hepatitis A virus in your blood. Antibodies are proteins your immune system makes to fight infections. They can appear months after you’ve been exposed to the virus.

Quick summary

["Helps determine if you’ve had hepatitis A or if you’re at risk of infection."]

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

Key facts at a glance

LOINC
85803-5
Short code
FLUAV H3 Ag Titr Islt HAI
Synonyms
FLUAV H3 Ag Titr Islt 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 like fever, fatigue, nausea, or jaundice (yellowing of skin/eyes), or if you’ve traveled to areas with higher hepatitis A risk. It’s also used for screening before certain procedures or vaccinations.

What to Expect Before the Test

No special preparation is needed. A blood sample is taken from a vein in your arm. You may feel a small pinch, but it usually takes only a few minutes. Avoid alcohol for 24 hours before testing if instructed by your doctor.

What the Results Mean

Positive results for IgM antibodies indicate an active infection (recent exposure). Positive IgG antibodies suggest past infection or immunity. Both IgG and IgM positive means you’ve recovered from hepatitis A. Negative results mean you haven’t been exposed recently.

Common Causes of Positive Results

IgM antibodies appear early in infection and fade over time. IgG antibodies persist longer, marking immunity. False positives can occur rarely with other hepatitis viruses or cross-reactions, so confirmation testing may be needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Hepatitis A is highly contagious and usually resolves on its own. Early detection helps manage symptoms and prevents complications. Vaccination is the best prevention for those at risk, especially children, travelers, or those with liver disease.

Short name

Hepatitis A Antibody Panel

Frequently asked questions

Will I need to fast before this test?
No fasting is required. Blood tests like this are typically done on an empty stomach, but your doctor may specify otherwise if you have other tests scheduled.
Can I take my medications before the blood draw?
Yes, you can take your usual medications as scheduled. However, inform your doctor about any medications, supplements, or herbal products you’re taking, as some may affect test results.
How long will I wait for my results?
Results are usually available within 1–3 business days. If your doctor suspects a different cause for symptoms, they may request additional testing or follow-up.
  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