UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

Hepatitis B Surface Antibody, Quantitative

Item Value
Approval req'd? No
Available Stat? No
Test code HBABQ
Test group Hepatitis
Performed by Immunology
In House Availability Monday-Friday day shift
Method Microparticle Chemiluminescent Immunoassay
Container type Gold top or Red top
Amount to Collect 1 mL blood
Sample type Serum
Preferred volume 0.5 mL serum
Processing notes Refrigerate serum
Units mIU/mL
Normal range
< 8 mIU/mL Not immune
8-11 mIU/mL Equivocal, questionable immunity
≥ 12 mmIU/mL Immune
Synonyms HBsAb; Hep B Surface Ab; HBV;. anti-HBs; anti-HBsAg; surface antibody
Stability Refrigerated 1 week
Turn around times 1-3 days
Additional information HBsAb is a marker of immunity to HBV infection, either by prior exposure to the virus or immunization with Hepatitis B vaccine. This assay reports the quantitative amount of antiviral antibodies present. Values greater than 10 mIU/mL are considered adequate for protection from viral infection. Results should be interpreted as follows:
NEGATIVE < 8 mIU/mL


EQUIVOCAL 8-11 mIU/mL


POSITIVE ≥ 12 mIU/mL


Equivocal results may be seen in individuals with adequate immunity; however, clinical correlation is required. All initially equivocal results are repeated in duplicate to confirm. Repeat testing could be performed in individuals with a recent vaccination history.
CPT coding 86317
Last Updated 6/20/2016 2:35:56 PM
Entry Number 1588
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center