Hepatitis B Core Antibody, Qualitative (Serum/Plasma)
This test detects the presence of IgM antibodies against the hepatitis B core antigen, which can indicate an active infection with hepatitis B virus (HBV). IgM antibodies typically appear early in infection and may help identify recent exposure.
["This test helps determine if you have an active hepatitis B infection."]
Key facts at a glance
- LOINC
- 108692-5
- Short code
- HBV core IgM Msmt SerPl
- Synonyms
- HBV core IgM Msmt SerPl
- 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
What Does This Test Measure?
The test measures IgM antibodies produced by your immune system in response to the hepatitis B core antigen. These antibodies are often found during the early stages of hepatitis B infection, helping doctors distinguish between acute infection and other conditions.
Why Might You Need This Test?
Your healthcare provider may order this test if you have symptoms of hepatitis B (such as fatigue, nausea, or jaundice), if you’ve been exposed to hepatitis B, or if you’re part of a screening for hepatitis B in certain groups (e.g., pregnant individuals, travelers to high-risk areas).
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample. The process is quick and usually painless.
What to Expect After the Test
After the blood is drawn, you may experience mild bruising or soreness at the site. Apply gentle pressure to stop any bleeding. Rest for a short time if you felt dizzy or lightheaded during the procedure.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Hepatitis B Core Antibody (IgM) Test
Frequently asked questions
Positive IgM antibodies suggest an active hepatitis B infection, meaning the virus is currently replicating in your body. This can be critical for early treatment and managing symptoms. However, IgM antibodies can also be present in rare cases of chronic hepatitis B if the infection was acquired early in life. Always consult your healthcare provider for interpretation.
If my test results are positive, what should I do next?
Can I get hepatitis B from this test?
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