CPT® Code 86709

The CPT® Code 86709 refers to the testing of a blood sample for the presence of the hepatitis A antibody (HAAb), specifically the IgM antibody. 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 protects against future infections. The test associated with CPT® Code 86709 is specifically designed to detect the IgM antibody to HAAb, indicating a current, acute infection. This is in contrast to CPT® Code 86708, which tests for both IgG and IgM antibodies without differentiating between them and is primarily used to assess immunity following vaccination against hepatitis A. The specificity of the IgM test in CPT® Code 86709 makes it a crucial tool for diagnosing active hepatitis A infections.