CPT® Code 86780

The CPT® Code 86780 refers to an antibody test specifically for Treponema pallidum, which is the bacterium responsible for causing syphilis, a sexually transmitted disease (STD). This test is crucial for diagnosing syphilis and is performed using various techniques, including fluorescent treponemal antibody absorption (FTA-ABS), T. pallidum particle agglutination (TP-PA), or indirect fluorescent antibody (IFA). Syphilis progresses through several stages, starting with the primary stage where a sore known as a chancre appears at the entry point of the bacterium. Although this sore typically resolves on its own within three to six weeks, the infection persists if left untreated, leading to further complications. In the secondary stage, patients may experience a range of symptoms, including a distinctive skin rash and mucous membrane lesions, particularly on the palms and soles. Other systemic symptoms can include fever, swollen lymph nodes, sore throat, hair loss, headaches, weight loss, muscle aches, and fatigue. These symptoms may also resolve spontaneously, but the infection remains active. If untreated, the disease can progress to a late or latent stage, which may not manifest symptoms for a decade or two. Late-stage syphilis can result in severe complications, such as coordination difficulties, paralysis, numbness, gradual blindness, and dementia, as the infection damages vital organs, including the brain, nerves, eyes, heart, blood vessels, liver, bones, and joints. A significant concern is the transmission of syphilis from an infected mother to her baby during pregnancy, which can lead to stillbirth or severe health issues in the newborn, including developmental delays or seizures. The FTA-ABS and IFA tests can be conducted on blood or cerebrospinal fluid (CSF) samples, while the TP-PA test is limited to blood samples only.