Hepatitis B Surface Antigen (HBsAg)
This test looks for a specific protein found on the surface of the Hepatitis B virus. Finding this protein means you currently have a Hepatitis B infection. It helps your doctor understand if you are infected and guides treatment.
When is it needed?
Suspected Hepatitis B infectionJaundiceFatigueAbdominal painBefore starting certain medications
How to prepare
No special preparation needed.
More about this test
This test looks for a specific protein found on the surface of the Hepatitis B virus. Finding this protein means you currently have a Hepatitis B infection. It helps your doctor understand if you are infected and guides treatment.
Medically reviewed by: Locatemycenter editorial team. Informational only; not medical advice. Always consult a licensed physician for diagnosis or treatment.
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