CPT® Code 84105

The CPT® Code 84105 refers to the laboratory test for measuring inorganic phosphorus, specifically phosphate levels in urine. Phosphate is a vital intracellular anion predominantly located in bone and soft tissue, playing a crucial role in various physiological functions. It is essential for cellular energy processes, which are particularly important for the proper functioning of nerves and muscles. Additionally, phosphate is integral to the formation and repair of bones and teeth. Abnormal phosphate levels can indicate underlying health issues; decreased levels are often associated with malnutrition and can lead to muscle weakness and neurological dysfunction. Conversely, elevated phosphate levels may suggest problems related to kidney function or parathyroid gland activity. The test for CPT® Code 84105 involves the collection of either a 24-hour urine sample or a random urine sample, which is then analyzed using quantitative spectrophotometry to determine the phosphate concentration. This method provides accurate measurements necessary for diagnosing and monitoring various medical conditions related to phosphate metabolism.