CPT® Code 87526

The CPT® Code 87526 refers to a laboratory test designed for the detection of the hepatitis G virus (HGV), also known as GB virus-C (GBV-C), through the use of nucleic acid amplification techniques. This test specifically targets the viral DNA or RNA, allowing for the identification of the infectious agent in a blood sample. Hepatitis G infection is typically asymptomatic and does not usually lead to significant liver inflammation; however, it can occur alongside other viral infections that may cause acute or chronic hepatitis. The transmission of HGV primarily occurs through exposure to infected blood and blood products, from mother to infant during childbirth, and through sexual contact with an infected individual. The testing process involves a direct probe test, which identifies a unique nucleic acid sequence known as the target sequence of the hepatitis G virus, if present in the sample. This is achieved by using a probe that is labeled with either fluorescent or chemiluminescent markers. The blood sample is treated to release nucleic acids from the virus, and the labeled probe binds specifically to the target sequence, forming a stable hybrid. In the amplified probe technique, the sensitivity of the assay is significantly enhanced by exponentially multiplying the target sequence of the hepatitis G virus DNA or RNA into millions of copies. The most prevalent amplification methods include polymerase chain reaction (PCR) and reverse transcriptase polymerase chain reaction (RT-PCR). Following amplification, the replicated sequences are identified using labeled DNA probes. Additionally, nucleic acid detection with quantification can be performed to assess the quantity of microorganisms present, often utilizing quantitative or real-time PCR to provide detailed reports on the absolute or relative amounts of the nucleic acid sequence detected.