Pacific · Hepatitis B Surface Antigen Lab Test
Hepatitis B Surface Antigen Lab Test in California
Hepatitis B Surface Antigen Lab Test can be ordered without a referral, and this guide covers what to expect. This blood test looks for Hepatitis B surface antigen, an early sign of Hepatitis B infection. It can help detect both recent and long-term infections.
What this test is
The Hepatitis B Surface Antigen test detects a protein found on the surface of the Hepatitis B virus. Its presence in the blood is usually the first indicator of an active Hepatitis B infection.
What it measures
- Hepatitis B Surface Antigen (HBsAg) — indicates the presence of Hepatitis B virus
What the test involves
This test requires a standard blood draw from a vein in your arm. A healthcare professional will collect the sample and send it to a laboratory for analysis.
Why it is often ordered
A clinician may order this test to screen for Hepatitis B infection or to diagnose symptoms of acute or chronic Hepatitis B. It is also used to monitor the effectiveness of Hepatitis B vaccination or treatment.
Preparation
No special preparation is typically needed for this test. Please follow any specific instructions provided by the laboratory where you will have your blood drawn.
How results are reported
Results are usually available within a few business days and will indicate whether the Hepatitis B surface antigen was detected. Reference ranges, which define normal and abnormal levels, can vary between laboratories.
Before you go
- Turnaround time
- Specific preparation instructions
- How results are delivered
Cities
Hepatitis B Surface Antigen Lab Test in California communities
Choose your city for local context and to request this test.