The Hepatitis B surface antigen test detects active Hepatitis B infection. Know your status with confidential venous blood testing and results in 1 day.
The Hepatitis B Surface Antigen (HBsAg) test is the primary screening test for active Hepatitis B infection. HBsAg is a protein found on the surface of the hepatitis B virus and is the first detectable marker of infection. Our venous blood test provides highly accurate results within 1 day, helping to identify both acute and chronic Hepatitis B infections.
Confidential consultation and risk assessment
Venous blood sample taken by trained nurses
HBsAg testing at UKAS-accredited laboratory
Results delivered securely within 1 day
A positive HBsAg (surface antigen) result indicates active Hepatitis B infection. This could be acute (recent infection) or chronic (lasting more than 6 months). You should contact your GP for further evaluation.
The Hepatitis B vaccine is highly effective and recommended for all at-risk groups including healthcare workers, MSM, people with multiple partners, and those travelling to endemic regions. Consult your GP about vaccination options.
Acute Hepatitis B often resolves on its own within 6 months. Chronic Hepatitis B cannot be cured but can be effectively managed with antiviral medications to prevent liver damage. Early detection is crucial.
Syphilis blood tests at the 6-week mark typically provide highly reliable results, with accuracy rates exceeding 95% for detecting infection. Understanding test accuracy can help reduce anxiety whilst ensuring appropriate screening decisions.
Experiencing non-consensual condom removal during sexual activity can understandably cause significant concern about potential STI exposure. Understanding your options and the testing process can help provide clarity during what may be a distressing time.
Mycoplasma genitalium (Mgen) has emerged as one of the most concerning sexually transmitted infections in recent years, yet many people remain unaware of its existence. Testing for this increasingly common STI has become critical due to rising infection rates and [growing antibiotic resistance](/blog/mgen-mycoplasma-genitalium-harder-to-treat).
Book your confidential hepatitis b surface antigen test london appointment today. Walk-in appointments also available at our South Kensington clinic.
At STI Clinic, our GPs and nurses are highly trained in sexual health and general medicine. We are committed to delivering confidential, non-judgemental care in a safe and supportive environment.
Our clinicians are fully registered and regulated to practise in the United Kingdom. We adhere strictly to national clinical standards and professional guidelines because patient safety, governance, and trust are non-negotiable.
Providing rapid and reliable sexual health diagnostics with dual-access pathways. Located in central London, we offer a professional environment with immediate walk-in care or pre-scheduled bookings.
Real reviews from our South Kensington clinic. We take pride in our professional medical staff and rapid diagnostic turnaround.
"Absolutely fantastic service. I was very nervous about the blood draw, but Nurse Luciana was so professional and gentle. She made the whole process painless. Results came back via secure email in 24 hours. Best clinic in South Kensington."
"Discreet, professional, and efficient. I walked in for an STI screening and was seen almost immediately. Luciana is an expert - she handled the blood test perfectly. Total peace of mind."
"High-quality clinical environment. Nurse Luciana is an absolute star; she explained everything clearly and made me feel at ease during the blood tests. 5-star care."