CPT® Code 86708

The CPT® Code 86708 refers to the testing of a blood sample for the presence of hepatitis A antibody (HAAb). Hepatitis A is an infectious disease characterized by acute inflammation of the liver, which is caused by the hepatitis A virus (HAV). During the acute phase of the infection, the liver experiences inflammation, but it typically heals completely without leading to chronic liver disease. Following recovery from hepatitis A, the patient develops lifelong immunity to the virus, which is a critical aspect of the body's response to the infection. The test associated with CPT® Code 86708 employs an enzyme immunoassay method to detect the presence of HAAb in the blood. This test is capable of identifying both IgG and IgM antibodies in a single assay, although it does not differentiate between the two types of antibodies. The primary purpose of this test is to assess the immune response to a previous hepatitis A vaccination, thereby determining whether the patient has developed immunity to hepatitis A. In contrast, CPT® Code 86709 is specifically used for testing IgM antibodies to HAAb, which is essential for diagnosing a current, acute hepatitis A infection.