CPT® Code 83970

The CPT® Code 83970 refers to the measurement of parathormone, also known as parathyroid hormone (PTH), which is a critical hormone produced by the chief cells in the parathyroid glands. This test is essential for assessing the levels of PTH in the blood or tissue, providing valuable insights into various metabolic processes in the body. Parathyroid hormone plays a significant role in regulating blood calcium levels, influencing the absorption and excretion of phosphate by the kidneys, and facilitating the synthesis of vitamin D. Abnormal levels of PTH can indicate underlying health issues; for instance, elevated levels may suggest hyperparathyroidism, which can be caused by parathyroid gland tumors or chronic renal failure. Conversely, decreased levels of PTH may indicate hypoparathyroidism, which can result from inadvertent removal of the parathyroid glands during thyroid surgery, autoimmune disorders, or genetic inborn errors of metabolism. The procedure for obtaining a blood sample involves a separately reportable venipuncture, while parathyroid gland tissue can be obtained through a separately reportable fine needle aspirate. The analysis of serum, plasma, or tissue samples is conducted using quantitative electrochemiluminescent immunoassay techniques, and plasma is specifically tested for parathyroid hormone using an immunoradiometric assay.