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HelpTest Code HBSAG Hepatitis B Surface Antigen (Qualitative)
Laboratory Code
LAB471
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII) / Red Top
Volume: 5.0 mL / 6.0 mL blood
Minimum Volume: 1.0 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs
Specimen Stability
| Specimen type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 6 days (preferred) |
| Frozen | 1 year |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
Monday through Friday, TAT 1 - 3 days
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
Non-reactive
Confirmatory information:
| Test name | Reference Interval |
|---|---|
| HBsAg (Confirmation) | Not confirmed |
Reflex Testing
Samples screened reactive for HBsAg are confirmed by HBsAg (Confirmation).
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
A “reactive” result suggests current hepatitis B infection
Service Code
32129
LOINC Code Information
5196-1
Alias
HBSAG
Hep B surface antigen
Hepatitis Bs Ag
Update
Last updated 21/02/2025