CPT® Code 87472

The CPT® Code 87472 refers to a laboratory test designed for the detection of the infectious agents Bartonella henselae and Bartonella quintana through the analysis of nucleic acids, specifically DNA or RNA. Bartonella is classified as a small, gram-negative bacillus that poses challenges in terms of isolation and culture in traditional laboratory settings. The use of nucleic acid probes facilitates the rapid identification of these specific Bartonella species by targeting their genetic material without the necessity for culturing the organisms. Bartonella henselae is primarily known for causing cat scratch disease (CSD), which can result in severe disseminated infections, while Bartonella quintana is linked to trench fever and bacillary angiomatosis, particularly in patients with HIV. The procedure employs advanced techniques such as polymerase chain reaction (PCR) or reverse transcriptase polymerase chain reaction (RT-PCR) to amplify the target sequences of Bartonella DNA or RNA, significantly enhancing the assay's sensitivity. This amplification process generates millions of copies of the target nucleic acid, which are then detected using DNA probes that are labeled with either fluorescent or chemiluminescent markers, ensuring specificity to the target sequence. Furthermore, the quantification aspect of this test allows for an assessment of the microbial load present in the sample, often utilizing quantitative or real-time PCR methods to provide detailed reports on the absolute or relative amounts of the detected nucleic acid sequences.