CPT® Code 82164

The CPT® Code 82164 refers to the measurement of angiotensin I-converting enzyme (ACE) through a blood test. ACE is an important enzyme that is primarily produced by endothelial cells, which line the blood vessels throughout the body, with a significant concentration found in the capillary beds of the lungs. Additionally, ACE can be secreted by granulomas, which are abnormal immune or inflammatory tumor-like masses that can form in various conditions. This test is particularly indicated for diagnosing and monitoring sarcoidosis, a condition characterized by the formation of granulomas in various organs. To perform the test, a blood sample is collected via a procedure known as venipuncture, which is separately reportable. The serum obtained from the blood sample is then analyzed using a quantitative enzymatic methodology to determine the ACE levels. Furthermore, cerebral spinal fluid (CSF) can also be tested for ACE levels, which involves obtaining a sample through a lumbar puncture, commonly referred to as a spinal tap. This CSF sample is subsequently tested using quantitative spectrophotometry to measure the ACE concentration accurately.