CPT® Code 82136

The CPT® Code 82136 refers to the quantitative measurement of amino acids, specifically when analyzing 2 to 5 amino acids from a specimen. This procedure involves obtaining a sample, which can be blood, urine, or cerebral spinal fluid (CSF), to assess the levels of amino acids present. Amino acids are organic compounds characterized by the presence of an amine group, a carboxylic acid group, and a unique side chain that distinguishes each amino acid from one another. They serve as the fundamental building blocks of proteins, which are essential for various biological functions, including metabolism and overall health. Abnormal levels of amino acids can lead to significant health issues, and symptoms such as failure to thrive, persistent vomiting, neurological deterioration, hyperammonemia, extreme lethargy, and metabolic acidosis may indicate an underlying problem with amino acid metabolism. Conditions that necessitate amino acid analysis often include acute life-threatening episodes and inborn errors of metabolism. The testing process typically employs ion exchange chromatography to accurately quantify the specific amino acids in the specimen. The exact amino acids analyzed depend on the clinical context; for instance, a cystinuria panel specifically evaluates four amino acids: arginine, cystine, lysine, and ornithine. It is important to note that the CPT® Code 82136 is applicable for the quantitative analysis of 2 to 5 amino acids, while CPT® Code 82139 is designated for the analysis of 6 or more amino acids. Each code is reported for every separate specimen that is tested.