CPT® Code 83919

The CPT® Code 83919 refers to the qualitative analysis of organic acids, which is performed on each specimen submitted for testing. Organic acids are metabolic by-products that result from the breakdown of proteins and other substances in the body. Under normal circumstances, these organic acids are metabolized into carbon dioxide and water. However, individuals with organic acid disorders experience difficulties in metabolizing certain proteins, leading to a range of health issues, including nutrient deficiencies and potential metabolic crises. These disorders are typically inherited in an autosomal recessive manner, affecting both males and females equally. The symptoms associated with organic acid disorders can vary significantly based on the specific type of disorder present, and treatment approaches are tailored accordingly. Common organic acids that may be tested include 2,4 dichlorophenoxyacetic acid, formic acid, glutaric acid (which is associated with glutaric acidemia type 1 due to the body's inability to properly metabolize lysine and tryptophan), hippuric acid, homogentisic acid, methylhippuric acid, methylmalonic acid (which can indicate a vitamin B12 deficiency), orotic acid, and trichloroacetic acid. Testing can be conducted using either blood or urine specimens, and if blood is the specimen of choice, a separate venipuncture procedure must be reported. The methodology for testing organic acids varies depending on the specimen type and the specific organic acid being analyzed. It is important to note that while CPT® Code 83918 involves a quantitative total analysis of multiple organic acids, providing measurements of their concentrations, CPT® Code 83919 focuses solely on qualitative analysis, determining the presence or absence of organic acids without quantifying their amounts. Each specimen analyzed under this code is reported separately, ensuring accurate documentation and billing for the services rendered.