CPT® Code 87495

The CPT® Code 87495 refers to a laboratory test designed to detect the infectious agent known as cytomegalovirus (CMV) through the analysis of nucleic acids, specifically DNA or RNA. Cytomegalovirus is a member of the herpesvirus family and is commonly transmitted from person to person via infected bodily fluids, which include blood, saliva, urine, semen, and breast milk. While CMV infection is prevalent in the general population, it typically manifests as a disease resembling mononucleosis primarily in individuals who are immunocompromised. In neonates, congenital or perinatal CMV infection can lead to severe health issues if symptoms are present at birth, or it may result in long-term complications such as hearing loss or vision impairment that may develop later in life. Additionally, pregnant women who contract CMV have the potential to transmit the virus to their fetus, which can have serious implications for the infant's health. The direct probe technique utilized in this test involves identifying a specific nucleic acid sequence, referred to as the target sequence, of the CMV if it is present in the biological sample. This process employs a probe that is labeled with either fluorescent or chemiluminescent markers. The sample undergoes treatment to release nucleic acids from the target organism, and the labeled probe selectively binds to the matching target sequence, forming a stable hybrid. This method is particularly effective because ribosomal RNA is often targeted, as it exists in numerous copies within most microorganisms, unlike genomic DNA, which may only have one or two copies. The test is distinct from the amplified probe technique, which significantly enhances assay sensitivity by exponentially multiplying the target sequence of CMV DNA or RNA into millions of copies, often utilizing polymerase chain reaction (PCR) or reverse transcriptase polymerase chain reaction (RT-PCR) for amplification. This allows for the identification of replicated sequences through labeled DNA probes, providing a robust method for detecting the presence of CMV in clinical samples.