CPT® Code 86781

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The CPT® Code 86781 refers to a confirmatory test for antibodies against Treponema pallidum, the bacterium responsible for syphilis. This test is crucial in diagnosing syphilis, as it helps confirm the presence of antibodies that indicate a current or past infection. The procedure involves collecting a blood sample from the patient, which is then analyzed in a laboratory setting. The confirmatory test, such as the Fluorescent Treponemal Antibody Absorption (FTA-abs) test, is typically performed after an initial screening test has indicated a potential syphilis infection. This step is essential for ensuring accurate diagnosis and appropriate treatment, as syphilis can lead to serious health complications if left untreated. The test specifically detects antibodies that the immune system produces in response to the Treponema pallidum bacterium, providing a reliable means of confirming the diagnosis of syphilis.