CPT® Code 83945

The CPT® Code 83945 refers to a laboratory test that measures the levels of oxalate in the blood or urine. Oxalate is a compound that is derived from oxalic acid, which is a naturally occurring substance found in various foods and produced by the body. In the context of this test, oxalate is significant because it can bind with calcium and magnesium to form oxalate compounds, which may have implications for kidney function and the formation of kidney stones. The measurement of oxalate levels is important for diagnosing and managing conditions related to oxalate metabolism, such as primary hyperoxaluria or calcium oxalate kidney stones. The test involves obtaining a blood sample through venipuncture, which is a procedure where a needle is inserted into a vein to collect blood. This blood sample is then analyzed using an enzymatic assay, a method that utilizes enzymes to quantify the oxalate concentration. Additionally, urine is collected over a 24-hour period, and the oxalate levels in the urine are measured using quantitative spectrometry, a technique that allows for precise measurement of the oxalate concentration in the urine. This comprehensive approach ensures accurate assessment of oxalate levels, aiding in the diagnosis and management of related health conditions.