CPT® Code 82330

The CPT® Code 82330 refers to the measurement of ionized calcium in a blood sample. Ionized calcium, also known as free calcium, is the form of calcium that circulates in the bloodstream without being bound to proteins. This measurement is crucial because ionized calcium plays a vital role in several physiological processes, including the regulation of heart function, muscle contraction, central nervous system activity, and the blood clotting mechanism. The assessment of ionized calcium levels is particularly important in specific clinical scenarios, such as prior to major surgical procedures, in patients who are critically ill, or when there are abnormalities in protein levels that may affect calcium binding. The testing for ionized calcium is typically performed using ion-selective electrode (ISE) or pH electrode methodologies, which provide accurate and reliable results for clinical decision-making.