CPT® Code 87537

The CPT® Code 87537 refers to the detection of the infectious agent HIV-2 through nucleic acid techniques, specifically utilizing a direct probe method. This procedure is essential for identifying the presence of HIV-2, one of the two serotypes of the human immunodeficiency virus, which can lead to acquired immunodeficiency syndrome (AIDS). HIV-2 is primarily transmitted through sexual contact, but it can also be spread through unscreened blood transfusions, sharing of needles, from mother to child during pregnancy or childbirth, and through breastfeeding. The virus targets the immune system by attacking T-cells, also known as CD4 cells, which are crucial for the body's defense against infections. The testing process begins with obtaining a blood sample from the patient. In the context of CPT® Code 87537, a direct probe technique is employed, which is less common due to its requirement for culturing the specimen. This method contrasts with other techniques such as amplified probe methods, which utilize amplification processes like reverse transcription polymerase chain reaction (RT-PCR) to detect lower levels of the virus. The direct probe technique involves several steps, including the lysis of red blood cells to isolate leukocytes, washing the leukocytes, and extracting DNA from the resulting pellet. The presence of HIV-2 DNA is then determined using specific detection methods. This testing is critical for diagnosing HIV-2 infections and monitoring the viral load, which is essential for evaluating treatment responses.