CPT® Code 84080

The CPT® Code 84080 refers to a laboratory test that measures the levels of alkaline phosphatase (ALP) isoenzymes in a blood sample. Alkaline phosphatase is a type of hydrolase enzyme that plays a crucial role in the removal of phosphate groups from various molecules. This enzyme is predominantly found in several tissues throughout the body, including the liver, bile ducts, kidneys, bones, and placenta. The measurement of ALP isoenzymes is significant because elevated levels can indicate various medical conditions, such as bile duct obstruction, Paget's disease, and certain types of tumors like seminomas. Conversely, decreased levels of alkaline phosphatase may be associated with conditions such as hypophosphatasia, Wilson's disease, specific types of anemia or leukemia, and other health issues, including malnutrition and hypothyroidism. The test is performed by obtaining a blood sample through venipuncture, which is a separately reportable procedure. The analysis of the sample is conducted using quantitative enzymatic methodologies, allowing for the differentiation of various isoenzymes, which include ALPI (intestinal), ALPL (non-specific, liver/bone/kidney), and ALPP (placental). This differentiation is essential for accurate diagnosis and management of the underlying conditions associated with abnormal ALP levels.