A simple finger-prick blood test to check for a current infection of hepatitis B.




Hepatitis B Surface Antigen Blood Test
- Results estimated in 3 working days
- Convenient testing options
- Bespoke doctor’s report
- Free delivery
Measures hepatitis B surface antigen (HBsAg) to check for an active hepatitis B infection.
How do you want to take your sample?
Please choose one option below-
Collect your own finger-prick blood sample at homeFreeWe’ll send you everything you need to collect your blood sample from your finger at home.
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Book a venous draw at a clinic Venous+£35Visit one of our national clinic partners for a nurse to take your venous blood sample from a vein in your arm. We’ll email you instructions on how to book after we’ve processed your order.
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Book a venous draw at home with a nurse Venous+£59Book a home nurse appointment for a nurse to take your venous blood sample from a vein in your arm.
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Self-arrange a professional sample collection VenousFreeMake an appointment at a phlebotomy clinic to have your venous blood sample taken. You will be responsible for arranging your appointment and any additional fees.
18+ Only. T&Cs apply.
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Go beyond the numbers
Get ready to elevate your health understanding with a personalised doctor's report. Go beyond results and tap into expert insights tailored just for you.
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How it works
You have the flexibility to choose what works best for you. Enjoy the comfort of having a friendly nurse visit your home for a quick blood draw, opt for a convenient visit to one of our nationwide partner clinics, or self-arrange a draw at a location that suits you.
Take control of your health with Medichecks – order your blood test today!

Track, improve, and monitor your health over time.
MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle and vital statistics.
Supported by a team of specialist and qualified doctors
Dr Natasha Fernando
Medical DirectorDr Tina Ghela
Digital Clinician LeadDr Susanna Hayter
Digital Clinician
What's in the test?
Infection
Hepatitis B surface antigen
Learn more
How to prepare for your test
Prepare for your Hepatitis B Surface Antigen Blood Test by following these instructions. If there is a chance that you have been exposed to HIV, hepatitis B or C then please let us know how long before taking your sample this occurred. Your sample should be taken 4 weeks after any hepatitis B exposure. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed.
Test limitations
This test detects an active infection but doesn't confirm whether it's acute or chronic. If you've got a positive result, further testing may be needed to assess liver function and long-term effects.
Reviews
FAQs
What is hep B?
Hepatitis B is an infection caused by the hepatitis B virus (HBV), which causes inflammation and enlargement of the liver. HBV infections can vary from a mild form that lasts a few weeks to a chronic form that can cause lasting liver damage. HBV is spread through contact with blood or other body fluids from an infected person. Exposure can occur through sharing needles or through unprotected sex. People who live in or travel to areas where HBV is prevalent are at greater risk. It is possible for pregnant women to pass the infection to their babies, usually during or after birth.
What can I learn from this test?
Hepatitis B Surface Antigen (HBsAg) can be detected in the blood on average around four weeks after exposure to HBV. HBV is a DNA virus that consists of a core particle and a surrounding envelope. The envelope of the virus contains the surface antigen (HBsAg). Therefore, our test looks for the presence of HBsAg to identify a hepatitis infection.
Who is the HBV antigen test for?
Our Hepatitis B Surface Antigen Blood Test is for people who think they may have an active current infection of hepatitis B. It does not test for antibodies, so it will not tell you whether you have immunity to hepatitis B.