CPT® Code 87521

Infectious agent detection by nucleic acid (DNA or RNA); hepatitis C, amplified probe technique, includes reverse transcription when performed

The CPT® Code 87521 refers to the detection of the hepatitis C virus (HCV) through nucleic acid testing, specifically utilizing an amplified probe technique. This procedure is crucial for identifying the presence of HCV, which is known to cause inflammation of the liver and can lead to serious complications such as chronic hepatitis C, cirrhosis, and liver cancer. The detection process involves analyzing the nucleic acids—either DNA or RNA—of the virus to determine if a patient has an active or chronic infection. The amplified probe technique enhances the sensitivity of the test, allowing for the detection of even low levels of the virus that may not be identifiable through standard methods. This is achieved through a process that includes reverse transcription, where the viral RNA is converted into complementary DNA (cDNA) for amplification. The use of specific primers and polymerase enzymes enables the replication of target sequences, resulting in a measurable fluorescent signal that indicates the presence of the virus. This method not only confirms infection but also aids in assessing the severity of the disease and monitoring the effectiveness of treatment.