2025 CPT code 87340
(Active) Effective Date: N/A Revision Date: N/A Laboratory - Microbiology Procedures Pathology and Laboratory Procedures Feed
Qualitative or semiquantitative immunoassay to detect hepatitis B surface antigen (HBsAg).
Modifiers 59 (distinct procedural service) and 91 (repeat clinical diagnostic laboratory test) may be applicable in certain scenarios, as described in the CPT manual.
Medical necessity for 87340 is established when a physician orders the test based on clinical suspicion of hepatitis B infection (e.g., symptoms, exposure history, risk factors) or as part of routine screening in specific situations (e.g., pre-surgical evaluation).Payers may have additional specific criteria that need to be met for coverage.
The clinical responsibility lies with the laboratory analyst who performs the immunoassay test on a patient's specimen. The ordering physician is responsible for medical necessity and interpretation of the results.
In simple words: This lab test checks for a protein on the surface of the hepatitis B virus in a blood sample.The test helps determine if someone has a hepatitis B infection.
This CPT code, 87340, represents the qualitative or semiquantitative detection of hepatitis B surface antigen (HBsAg) using an immunoassay technique.The immunoassay techniques may include enzyme immunoassay (EIA), enzyme-linked immunosorbent assay (ELISA), fluorescence immunoassay (FIA), or immunochemiluminometric assay (IMCA). The test utilizes a primary source specimen (e.g., blood) to identify the presence of HBsAg, a protein on the surface of the hepatitis B virus.This test helps diagnose or rule out hepatitis B infection. For quantitative HBsAg testing, use code 87467.
Example 1: A patient presents with symptoms suggestive of acute hepatitis B (jaundice, fatigue, fever). The physician orders an HBsAg test (87340) to confirm the diagnosis.A positive result would support the diagnosis of acute hepatitis B infection., A patient is undergoing pre-operative screening for a surgical procedure.The physician orders an HBsAg test (87340) as part of the routine blood work to assess their risk for blood-borne viral infections. A negative result would reassure the surgical team., A patient with a history of intravenous drug use is being monitored for chronic hepatitis B infection. Regular HBsAg testing (87340) is conducted to assess the effectiveness of antiviral therapy and monitor disease progression. Persistent positive results indicate chronic infection.
** Always check payer-specific guidelines and coverage policies for accurate billing.
- Revenue Code: T1H (LAB TESTS - OTHER)
- Payment Status: Active
- Modifier TC rule: Not applicable.
- Specialties:Infectious Disease, Gastroenterology, Internal Medicine, Pathology
- Place of Service:Office, Hospital (Inpatient or Outpatient), Laboratory, Ambulatory Surgical Center