Lab test

Hepatitis B Immunity Status Test - Hep B

A hepatitis B immunity status test uses a blood sample to help show whether a person is protected against the hepatitis B virus.

Typical price

From $48

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

A hepatitis B immunity status test uses a blood sample to help show whether a person is protected against the hepatitis B virus. It looks for antibodies in the blood, including IgG and IgM types, that reflect previous vaccination or past infection. People often order it to confirm that a vaccine series produced immunity, or to check status after a possible exposure. It is a screening and monitoring tool rather than a diagnosis. A healthcare provider interprets the antibody pattern alongside vaccination and exposure history.

• Hepatitis B surface antibody (anti-HBs, IgG) Antibodies that generally reflect protection from vaccination or recovery from infection.
• Hepatitis B core antibody (anti-HBc, IgM) Antibodies that can indicate recent or ongoing hepatitis B infection.

• People who want to confirm immunity after hepatitis B vaccination
• Individuals whose job or school requires proof of hepatitis B immunity
• People with a possible exposure to hepatitis B
• Those with a sexual or household contact who has hepatitis B
• Individuals whose healthcare provider is monitoring hepatitis B status

• No fasting is required for this blood test
• A standard blood draw is used to collect the sample
• Bring your vaccination history if available, as it helps interpretation
• Tell the lab about any medications that affect the immune system

Results are interpreted from the pattern of antibodies. Detectable hepatitis B surface antibody generally suggests protection, whether from vaccination or past infection. A reactive hepatitis B core antibody IgM can indicate recent infection. Sometimes results are unclear, in which case additional testing may be recommended. A single antibody result does not tell the whole story, so a healthcare provider interprets the full pattern. Discuss your hepatitis B immunity results with a healthcare provider before making decisions.

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