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HelpTest Code LAB471 Hepatitis B Surface Antigen (HBsAg)
Infectious
Reporting Title
Hepatitis B Antigen
Methodology
Roche Diagnostics Electrochemiluminescence Immunoassay
Patients who are positive for HBsAg are considered to have hepatitis B. The disappearance of HBsAg and appearance of anti-HBsAg is associated with sero conversion and recovery.
Performing Laboratory
OhioHealth Laboratory Services-RMH Special Testing
Specimen Requirements
Preferred:
Draw blood in a gold-top serum gel tube(s). Spin down and send 1 mL of serum refrigerated. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.
Alternate:
Plasma from either lithium or sodium heparin and K2 EDTA are acceptable
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum/Plasma | Refrigerated | 14 days |
| Ambient | 6 days | |
| Frozen | 3 months |
Specimen Transport Temperature
Refrigerate: OK
Ambient: OK
Frozen: OK
Reference Values
Negative
Critical value: Positive
Alerting category: First instance called within 8 hours
Day(s) Test Set Up
Monday through Friday: 24/7
Saturday and Sunday: Day shift
Test Classification and CPT Coding
87340 - HBsAg
87341 - HBsAg confirmation (if appropriate)