Hep B antigen

  • What's tested:

    Hep B antigen


Information About The Tests

Hep B antigen

The Hepatitis B surface antigen (HBsAg) blood test is a diagnostic test used to detect the presence of the hepatitis B virus (HBV) in the blood. HBsAg is a protein on the surface of the virus, and its presence indicates an active infection with hepatitis B. The test is commonly performed as part of routine screening for hepatitis B or when someone is suspected of having been exposed to the virus.

  1. Results: If HBsAg is detected in the blood, it suggests a current or recent infection with hepatitis B. If the test is negative, it indicates the absence of the virus.

The HBsAg blood test is crucial for several reasons:

  1. Diagnosis of Hepatitis B: A positive result indicates an active hepatitis B infection. Further tests may be needed to determine the stage of the infection and the need for treatment.
  2. Screening for Chronic Hepatitis B: Chronic hepatitis B can lead to long-term liver damage. The HBsAg test is often used to screen individuals, especially those at higher risk, for chronic infection.
  3. Monitoring Treatment: For individuals undergoing treatment for hepatitis B, regular testing for HBsAg helps monitor the effectiveness of antiviral medications.
  4. Preventing Transmission: Knowing the hepatitis B status is important for preventing the spread of the virus to others, as hepatitis B is contagious.

It's important to consult with a healthcare professional for interpretation of the test results and appropriate follow-up, especially if HBsAg is detected. Follow up tests may be required. Vaccination against hepatitis B is available and is recommended as a preventive measure, especially for those at higher risk of exposure.

How it works

Buy a test + at-home sample collection

If at-home or workplace service is available in your area, purchase for an additional $55 fee.

Schedule an appointment

After you make a purchase, one of our Express Pathology nurses will contact you to schedule an in-at-home or office blood collection appointment.

At-home blood sample collection

One of our friendly nurses will collect your blood sample and send it to the nearest laboratory.

Get fast results in your inbox

Access results in your email inbox as soon as they're available.

Blood collection currently available in NSW, VIC, and QLD.

Easy-to-understand results.

Your results will be emailed to you within 24 - 36 hours after collecting your sample. You will receive a text SMS notification when your results are ready. Your results are highly confidential, but you can choose to share your results with your healthcare provider, family, or friends.

Independent support.

Express Pathology reviews your test results and will contact you directly if they require prompt attention. You will be encouraged to speak directly with your primary GP.

Frequently asked 

If you can’t find the answer to your question or have a general question or comment about this website, please contact us.

Need to know more? Call us at
02 9545 2940Book a visit
  • How early can you come to my home or office?

    Our Nurses can generally start from 6am.

  • How do I pay for this service?

    Payment process is simple. We have integrated secure Commbank Payment Gateway to take payments online. Simply complete the online form and make the payment using the ‘Proceed to Book’ button.

  • Can I be seen on a weekend?

    Yes, our nurses work 7 days a week.

  • Can you come to my work?

    Yes we can attend your work premises if you have a private area to conduct the blood collection.

  • Is there a medicare rebate/ bulk billing available?

    No, this is a private service not linked to Medicare.

  • Do I need to Fast?

    Fasting is optional however, please indicate to your blood collector if you have been Fasting or not.

  • What happens with my results?

    Your results are reviewed by our GP and sent to you securely through email. If action is required our GP will be in contact with you.

  • Do Prestige keep a copy of my results?

    Yes they are held in our secure database.