CPT® Code 80408

The CPT® Code 80408 refers to an aldosterone suppression evaluation panel, which is a laboratory test designed to assess the levels of aldosterone and renin in patients who may have primary and/or secondary hyperaldosteronism. Hyperaldosteronism is a condition characterized by excessive production of aldosterone, a hormone that plays a crucial role in regulating blood pressure, sodium, and potassium levels in the body. Primary hyperaldosteronism, often caused by conditions such as benign adrenal tumors or bilateral adrenal hyperplasia, leads to elevated aldosterone levels, resulting in sodium retention, potassium depletion, and increased blood pressure. In contrast, secondary hyperaldosteronism is more prevalent and is typically associated with elevated renin levels alongside aldosterone. This condition can arise from various factors, including renal artery stenosis, congestive heart failure, cirrhosis, kidney disease, and preeclampsia. The symptoms of hyperaldosteronism can include urinary frequency, increased thirst, fatigue, muscle weakness or cramping, palpitations, and headaches. The aldosterone suppression evaluation test is performed to measure both aldosterone and renin levels at baseline and to observe the changes that occur following an intravenous infusion of isotonic sodium chloride (0.9% NaCl) solution. Proper patient preparation is essential for accurate results, which includes adhering to a normal sodium diet for three days prior to the test and avoiding medications that may influence the renin-aldosterone system. Depending on the physician's instructions, the test may be conducted with the patient in a supine or upright position, affecting the timing and method of blood sample collection. The procedure involves establishing an intravenous line, administering the sodium chloride infusion, and obtaining blood samples to evaluate the hormonal levels before and after the infusion.