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HelpTest Code QBSAG Hepatitis B Surface Antigen (Quantitative)
Additional Codes
| Epic Ordering Code | LAB2409 |
| NBS code | LBC00505 |
| Service code | 32131 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: |
| Yellow Top | Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen type | Serum |
|---|---|
| Ambient | 7 days |
| Refrigerate | 14 days (preferred) |
| Frozen | 28 days |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
Tuesday, TAT 2 - 8 days
Reference Interval
< 0.05 IU/mL: considered Non-reactive by the criteria of ALINITY HBsAg
≥ 0.05 IU/mL: considered Reactive by the criteria of ALINITY HBsAg
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Quantification of serum Hepatitis B surface antigen helps the management of patients with Chronic Hepatitis B infection.
Update
Last updated 17/07/2026
LOINC Code Information
| Hepatitis B surface antigen, quantitative | 63557-3 |
|---|---|
| QBSAG | 65633-0 |
Alias
QBsAG