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 Antigen

Item Value
Approval req'd? No
Available Stat? No
Test code HBAG
Test group Hepatitis
Performed by Immunology
In House Availability Monday-Friday (day shift). Note: confirmatory test is performed Monday & Thursday only.
Method Microparticle Chemiluminescent Immunoassay
Container type Gold top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum (insufficeint for confirmatory testing)
Processing notes Refrigerate sample
Normal range Negative
Synonyms HBsAg; Hep B surface Ag; HBV; Australia antigen; HAA; Hepatitis associated antigen; surface antigen
Stability Refrigerated 6 days
Turn around times 1-3 days (Confirmation of positives requires additional 3-5 days)
Reflex? A confirmatory test will automatically be run on all positive specimens at an additional charge.
Additional information HBsAg is the most useful single marker of acute or chronic HBV infection. The distinction between chronic carriage and acute or convalescent carriage can be difficult; chronic carriage is suggested by the absence of IgM anti-HBc, a positive test for Total (and therefore IgG) anti-HBc, and persistence of HBsAg for more than 6 months. A confirmatory test will be automatically be performed on all positive assays (ordered only by Immunology)

This test is not FDA approved for donor screening. For pre-transplant donor screen see Pre-Transplant Send out (PTXID).

Positive results are automatically forwarded to California public health per regulations. However, this does not absolve the ordering provider from any additional reporting if such is required.
CPT coding 87340
LOINC code 5196-1
Last Updated 10/15/2014 1:02:57 PM
Entry Number 482
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center