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Test ID HBAGP Hepatitis B Surface Antigen Prenatal, Serum

Useful For

Stand-alone prenatal screening test for chronic hepatitis B virus (HBV) infections in pregnant women

 

This test is not offered as a screening or confirmatory test for blood donor specimens.

 

This test is not useful for diagnosis of hepatitis B during the "window period" of acute HBV infection (ie, after disappearance of hepatitis B surface antigen and prior to appearance of hepatitis B surface antibody).

Special Instructions

Method Name

Chemiluminescence Immunoassay (CIA)

Reporting Name

HBs Antigen Prenatal, S

Specimen Type

Serum SST


Ordering Guidance


This test is intended for standalone prenatal screening only. For testing non-pregnant patients, order HBAG / Hepatitis B Surface Antigen, Serum.

 

This test is not intended for testing cadaver or grossly hemolyzed specimens. For testing such patients, order HBGCD / Hepatitis B Surface Antigen for Cadaveric or Hemolyzed Specimens, Serum, which is FDA-approved for testing on these sources.



Additional Testing Requirements


Testing for acute hepatitis B virus (HBV) infection should also include HBIM / Hepatitis B Core Antibody, IgM, Serum, as during the acute HBV infection "window period", hepatitis B surface (HBs) antigen and HBs antibody may not be detected.



Necessary Information


1. Date of collection is required.

2. Indicate if specimens are from autopsy/cadaver or hemolyzed sources so that the proper FDA-licensed assay can be performed.



Specimen Required


Collection Container/Tube: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 2 mL

Collection Instructions:

1. Centrifuge blood collection tube per collection tube manufacturer's instructions (eg, centrifuge and aliquot within 2 hours of collection for BD Vacutainer tubes).

2. Aliquot serum into plastic vial.


Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum SST Frozen (preferred) 28 days
  Refrigerated  7 days
  Ambient  24 hours

Reference Values

Negative

See Viral Hepatitis Serologic Profiles in Special Instructions.

Day(s) Performed

Monday through Sunday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

87340

87341 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
HBAGP HBs Antigen Prenatal, S 5196-1

 

Result ID Test Result Name Result LOINC Value
HBSAP HBs Antigen Prenatal, S 5196-1

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
HBNTP HBs Ag Confirmation Prenatal, S No No

Testing Algorithm

If hepatitis B surface antigen (HBsAg) prenatal is reactive, then HBsAg confirmation will be performed at an additional charge.

Report Available

Same day/1 to 2 days

NY State Approved

Yes

Forms

If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Client Test Request (T728) with the specimen.