CPT® Code 83735

The CPT® Code 83735 refers to the laboratory test for measuring magnesium levels in the body. Magnesium is a vital dietary mineral that plays a crucial role in various physiological functions, including enzyme activity, energy production, and the regulation of muscle contraction and relaxation. This test can be performed on different types of specimens, including blood, urine, or fecal samples, to assess the magnesium concentration. Low magnesium levels can be indicative of several health issues, such as severe burns, metabolic disorders, the effects of certain medications, and low blood calcium levels. The testing process involves obtaining a blood sample through venipuncture, which is a separate reportable procedure. For the analysis, red blood cells (RBCs) are evaluated using quantitative inductively coupled plasma-mass spectrometry, while serum or plasma samples are analyzed using quantitative spectrophotometry. Additionally, a 24-hour voided urine specimen can be tested using quantitative spectrophotometry, and a random or 24-hour fecal sample may also be assessed using the same spectrophotometric method. This comprehensive approach ensures accurate measurement of magnesium levels, which is essential for diagnosing and managing various medical conditions.