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Hepatitis B Surface Antigen, Quantitative, Monitoring (Not for Diagnosis)
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**IMPORTANT: CPT Code is informational only; obtain the Test Code for ordering.
Quantitative measurement of HBsAg may be used to confirm ongoing HBV replication and monitor responses to antiviral therapy. Published studies support the viewpoint that repeatedly low to undetectable HBsAg values are a good predictor of sustained viral clearance. This test should be used on individuals previously diagnosed with hepatitis B infection by qualitative HBsAg testing.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.