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Hepatitis B Surface Antigen

Hepatitis B surface antigen is present in the blood during a current hepatitis B infection.

See your own Hepatitis B Surface Antigen on its range.

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What Hepatitis B Surface Antigen measures

Hepatitis B surface antigen is present in the blood during a current hepatitis B infection.

If your Hepatitis B Surface Antigen result is not the expected one

A positive result means hepatitis B surface antigen is present, commonly associated with current hepatitis B infection.

Commonly associated with

Worth asking your clinician: What follow-up testing is being considered.

Expected result

Usually reported as Negative.

If it is within range

Hepatitis B surface antigen was not detected.

Also listed as

HBsAg, Hep B Surface Ag, HBsAg Screen

Related tests

This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.