CPT® Code 82103

The CPT® Code 82103 refers to the measurement of total Alpha-1-antitrypsin (A1A) levels in the blood. Alpha-1-antitrypsin is a crucial protein synthesized in the liver, which plays a significant role as a serum protease inhibitor. This protein is essential for protecting various organs, particularly the lungs, from damage caused by proteolytic enzymes, such as elastase, which can lead to tissue destruction. In the absence of adequate levels of Alpha-1-antitrypsin, which is often due to genetic factors, individuals may experience significant organ damage, particularly in the lungs, resulting in conditions like early onset emphysema. The measurement of Alpha-1-antitrypsin levels is particularly important in clinical settings for diagnosing the underlying causes of certain symptoms, such as persistent jaundice or other indications of liver dysfunction. The testing process involves obtaining a blood sample through a procedure known as venipuncture, which is reported separately. The serum obtained from the blood sample is then analyzed using an immunoturbidimetric technique to determine the total levels of Alpha-1-antitrypsin present. This test is often a preliminary step, and if the results indicate lower than normal levels of Alpha-1-antitrypsin, further testing may be warranted to assess the phenotype of the protein, which can provide additional insights into the patient's condition and guide treatment options.