The Hepatitis B Surface Antibody Quantitative test (also known as Anti-HBs or HBsAb) measures the level of antibodies your immune system has developed against the hepatitis B virus — either from vaccination or from a previous infection. A result of 10 mIU/mL or higher confirms immunity.
What this test is used for:
- Confirm immunity after completing the hepatitis B vaccine series
- Verify immunity for healthcare workers, medical students, and clinical staff as part of occupational health compliance
- Determine whether a booster vaccine may be needed if antibody levels have declined
- Evaluate immune response in individuals with known hepatitis B exposure history
Who should order this test: Healthcare workers are the most common group requiring this test. Hospitals, clinics, dental offices, and long-term care facilities routinely require documented hepatitis B immunity before employment or clinical rotation. This test is also appropriate for anyone who completed the hepatitis B vaccine series and wants to confirm it was effective.
What your result means: A result of 10 mIU/mL or higher is considered protective immunity. A result below 10 mIU/mL may indicate immunity was not established, that antibody levels have waned, or that a booster dose should be considered. Results below this threshold should be reviewed with a physician.
Test preparation: No fasting or special preparation is required.
Physician order included. No insurance or doctor’s visit required. Results in 24–48 hours through Labcorp. HSA and FSA eligible.
Also Known As
Antibody to Hepatitis B Surface Ag, HBsAb, Hepatitis B Surface Antibody, Hepatitis B Surface Antibody-Quant, Hepatitis Bs Ab, Anti-HBs, HBAB, Hepatitis B Surface Ab
The Purpose of a Hepatitis B Surface Antibody Quantitative Test
Hepatitis B is a version of viral hepatitis. This type of liver disease is contagious if you come into contact with bodily fluids from someone with hepatitis B. People are at higher risk if they engage in unsafe sex, share drug needles, or work in healthcare settings, among other situations. Hepatitis B can be mild, resolving after a brief period of time. However, in some cases the virus lingers, and this chronic form of the disease can increase the odds of liver disease or cancer. (One good way of preventing hepatitis B? Getting the vaccine that prevents the disease.).
What Does the Hepatitis B Surface Antibody Quantitative Test Measure?
The hepatitis B surf ab quant test measures the level of antibodies your immune system produces to fight the hepatitis B virus.
Who Should Take a Hepatitis B Surf AB Quant Test?
You should get tested if you are in one of the high-risk categories and suspect you’ve been in close contact with infected bodily fluids. A hep B surface ab quantitative lab test may also be advisable if you have these symptoms associated with the disease:
- Loss of appetite
- Fever
- Fatigue
- Jaundice
- Stomach pain and nausea
Hep B Surface AB Quantitative Test Preparation
This test does not require any special preparations before getting your blood work done.
Hep B Surface Antibody Quantitative Blood Test Results
You are considered immune from hepatitis B if your results are ≥10 mIU/mL. Results lower than that may require further testing for hepatitis or other liver issues.
Where Can I Get a Hepatitis B Surface Antibody Titer Test Near Me?
A hepatitis B surface antibody quantitative blood test is a critical tool in your fight against the disease, and you can find this test—and hundreds more—at Personalabs. Here, you can shop online for health tests that deliver fast, accurate results you can use to inform your healthcare choices. It works like this:
Step 1: Purchase your test and download the lab order that comes with it. You may not need to get your doctor’s approval beforehand, depending on the state where you live.
Step 2: Go to our lab locator on the Personalabs website and pinpoint the facility near you for testing. We have more than 4,000 labs we work with nationwide thanks to our partnership with Labcorp one of the country’s top lab companies.
Step 3: Complete your blood test at the lab. (Be sure to bring the test order with you.)
Step 4: Review your results in your secure and private Personalabs portal; they typically arrive between 2 and 10 business days after your test. If you need to get the results by a certain date, contact us, and we can reach out to the lab for you.
Take charge of your health. Shop Personalabs today.
Frequently Asked Questions
What does a Hepatitis B Surface Antibody test show? It measures the level of antibodies your immune system has produced against the hepatitis B surface antigen, indicating whether you are immune from vaccination or from a prior infection that resolved.
What is a normal Hepatitis B Surface Antibody level? A level of 10 mIU/mL or greater is considered protective immunity. Results below 10 mIU/mL suggest immunity may not be established and a physician should be consulted about revaccination.
Is this test required for healthcare workers? Yes. Most healthcare employers, hospitals, and clinical training programs require documented hepatitis B immunity as part of pre-employment or pre-rotation screening. This test provides quantitative evidence of immunity that can be submitted to employers or credentialing bodies.
How is this different from a Hepatitis B Surface Antigen test? The Surface Antibody test (HBsAb) checks whether you are immune. The Surface Antigen test (HBsAg) checks whether you are currently infected. These are separate tests measuring different things.
Do I need a doctor’s order for this test? No. Personalabs provides a physician-approved lab order with every purchase. No referral or insurance required. Results in days through Labcorp.
