CPT® Code 82030

Adenosine, 5-monophosphate, cyclic (cyclic AMP) is a critical nucleotide involved in various cellular processes, particularly in intracellular signaling. This compound is derived from adenosine and is found in RNA as an ester of phosphoric acid. The measurement of cyclic AMP levels in blood or urine is essential for diagnosing certain medical conditions. The enzyme adenylate cyclase synthesizes cyclic AMP from ATP, and its production is regulated by hormones such as adrenaline and glucagon. The testing for cyclic AMP is primarily utilized in the differential diagnosis of hypercalcemia, a condition characterized by elevated calcium levels in the blood, and it may also serve as an adjunctive test for assessing parathyroid hormone resistance. To perform this test, a blood sample is collected through venipuncture, which is a separately reportable procedure. The collected plasma is then frozen and analyzed using radioimmunoassay techniques. Additionally, urine samples can be collected either as a 24-hour specimen preserved with 10 ml of 6M hydrochloric acid or as an unpreserved random sample, with a minimum volume of 5 ml. It is important to document the total volume of urine voided and the time interval for accurate testing. The urine may also be analyzed using radioimmunoassay or high-pressure liquid chromatography methods.