CPT® Code 86692

The CPT® Code 86692 refers to a laboratory test specifically designed to measure antibodies related to the hepatitis delta agent (HDV). This test evaluates both total antibodies and immunoglobulin M (IgM) antibodies against the hepatitis delta virus. Hepatitis delta is classified as an RNA virus and is distinct from other hepatitis viruses such as Hepatitis A, B, and C. It is characterized as a sub-viral entity, meaning it cannot replicate independently and requires the presence of the Hepatitis B virus (HBV) for its replication process. The transmission of HDV can occur simultaneously with HBV infection, leading to co-infection, or it can occur later, resulting in a super-infection. The presence of HDV in individuals co-infected with HBV significantly increases the risk of severe liver complications, including cirrhosis, liver failure, and hepatocellular carcinoma (liver cancer). A positive result for total HDV antibodies may suggest either an acute or chronic infection with the virus. Furthermore, the measurement of IgM antibodies is crucial as it helps differentiate between active viral replication during an acute infection and the reactivation of a chronic infection. The test is performed on a blood sample, which is obtained through a venipuncture procedure that is reported separately. The serum is then analyzed for total antibodies using a qualitative enzyme immunoassay, while IgM antibodies are assessed using a specific enzyme immunoassay method.