CPT® Code 86687

The CPT® Code 86687 refers to the laboratory test for antibodies to human T-lymphotropic virus type I (HTLV-I). This test is crucial for diagnosing infections caused by HTLV-I and HTLV-II, which are both sexually transmitted diseases. These viruses can also be transmitted through unscreened blood transfusions, sharing of needles, and from mother to child during pregnancy or breastfeeding. HTLV-I is particularly significant as it is associated with serious health conditions, including adult T-cell leukemia and various disorders affecting bone marrow and blood cells. The human immunodeficiency virus (HIV), which is also tested for in conjunction with HTLV, compromises the immune system by targeting T cells or CD4 cells, leading to a reduced ability to combat infections. The final stage of HIV infection is known as acquired immunodeficiency syndrome (AIDS). The testing for HTLV-I and HTLV-II antibodies is typically performed using an enzyme immunosorbent assay (EIA), which detects the presence of these antibodies in human serum or plasma. If the initial EIA test yields a positive result, a confirmatory test is conducted using immunoblot or Western blot techniques, which are reported under CPT® Code 86689. The Western blot method involves separating proteins by size and shape through gel electrophoresis, followed by transferring these proteins onto a membrane where specific antibodies can bind, allowing for the detection of the viruses. This comprehensive testing process is essential for accurate diagnosis and management of infections related to HTLV and HIV.