Hepatitis B Virus (HBV) Prenatal Screen, HBsAg

CPT: 87340
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  • HBsAg
  • Hepatitis

Special Instructions

This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Expected Turnaround Time

1 - 2 days

Related Documents

Specimen Requirements


Serum or EDTA plasma


3.5 mL

Minimum Volume

1.5 mL (Note: This volume does not allow for repeat testing.)


Gel-barrier tube, red top tube or lavender-top (EDTA) tube


If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic transport tube.

Storage Instructions

Room temperature

Stability Requirements



Room temperature

14 days


14 days


14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Non-EDTA plasma specimen; PST gel-barrier tube

Test Details


Screening of pregnant women for hepatitis B virus (HBV) infection to identify neonates who are at risk of acquiring hepatitis B during the perinatal period.


Patients who are negative for HBsAg may still have acute hepatitis B infection. A nonreactive/negative result in individuals with prior exposure to hepatitis B may be due to antigen levels below the detection limit of the assay or lack of antigen reactivity to the antibodies in the assay used. In cases with strong clinical suspicion of viral hepatitis, testing should not be limited to detecting HBsAg, but should include a battery of tests to evaluate different stages of acute and convalescent hepatitis, including detection of antibodies to hepatitis B core antigen (anti-HBc) and HBV DNA.


Immunochemiluminometric assay (ICMA)

Additional Information

Hepatitis B surface antigen (HBsAg) is a distinctive serological marker of acute or chronic hepatitis B infection. HBsAg is the first antigen to appear following infection with HBV and is generally detected 1-10 weeks after the onset of clinical symptoms. HBsAg assays are routinely used to diagnose suspected HBV infection and monitor the status of infected individuals to determine whether the infection has resolved or the patient has become a chronic carrier of the virus. In patients that recover from HBV infection, HBsAg is undetectable 3-5 months after the onset of infection. In patients with chronic HBV infection, HBsAg remains detectable for life. Prenatal HBsAg screening has been recommended so that newborns from HBV carrier mothers may obtain prophylactic treatment.

Refer to https://www.cdc.gov/hepatitis/hbv/pdfs/PrenatalHBsAgTesting.pdf for additional information on HBV testing recommendations in pregnant women.


Abara WE, Oaseem A, Schillie S. McMahon BJ, Harris AM, High Value Care Task Force of the American College of Physicians and the Centers for Disease Control and Prevention. Hepatitis B Vaccination, Screening, and Linkage to Care: Best Practice Advice from the American College of Physicians and the Centers for Disease Control and Prevention. Ann Intern Med. 2017 Dec 5;167(11):794-804.29159414
Centers for Disease Control and Prevention. Hepatitis B. CDC web site: www.cdc.gov/hepatitis/hbv/index.htm. Accessed May 2021.
Centers for Disease Control and Prevention; The American Colllege of Obstetrics and Gynecologists. Screening Pregnant Women for Hepatitis B Virus (HBV) Infection and Screening and Referral Algorithm for Hepatitis B Virus (HBV) Infection Among Pregnant Women. CDC web site: https://www.cdc.gov/hepatitis/hbv/pdfs/PrenatalHBsAgTesting.pdf. Accessed June 2021.
Schillie S, Vellozzi C, Reingold A, et al. Prevention of Hepatitis B Virus Infection in the United States. Recommendations of the Advisory Committee on Immunization Practices. MMWR Recomm Rep. 2018 Jan 12;67(1):1-31.29939980


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
144510 HBV Prenatal Screen 006510 HBsAg Screen 5196-1
Reflex Table for HBsAg Screen
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 016105 HBsAg Confirmation 016105 HBsAg Confirmation 7905-3

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