CPT® Code 82310

The CPT® Code 82310 refers to the measurement of total calcium in a blood sample. Calcium is a vital mineral that plays a crucial role in various bodily functions. Approximately 99% of the calcium in the human body is stored in the bones, contributing to their strength and structure. The remaining 1% of calcium circulates in the bloodstream, where it exists in two forms: ionized (free) calcium and bound calcium. Ionized calcium is the metabolically active form that is essential for numerous physiological processes, while bound calcium is attached to proteins and is considered inactive. The total calcium measurement encompasses both free and bound calcium levels in the blood, providing a comprehensive assessment of calcium status. This test is significant for screening and monitoring various medical conditions that may impact the bones, heart, nerves, kidneys, and teeth. The total calcium level is typically determined using a laboratory technique known as spectrophotometry, which quantifies the concentration of calcium in the blood sample.