CPT® Code 84206

The CPT® Code 84206 refers to a laboratory test that measures the levels of proinsulin in the blood. Proinsulin is a precursor hormone to insulin, which is produced by the beta cells located in the pancreas, specifically within the islets of Langerhans. This test is significant as it provides insights into the body's insulin production and can help in assessing various metabolic conditions. To perform this test, a blood sample is collected through a procedure known as venipuncture, which is a separate reportable service. The serum obtained from the blood sample is then analyzed using a qualitative enzyme-linked immunosorbent assay (ELISA), a common laboratory technique used to detect and quantify proteins, hormones, and other substances in biological samples. The measurement of proinsulin levels is particularly relevant in the context of pre-diabetes and the progression toward type 2 diabetes mellitus, as elevated levels may indicate an impaired insulin response. Additionally, high proinsulin levels can be associated with several medical conditions, including benign or malignant B-cell tumors of the pancreas, renal failure, cirrhosis, and hyperthyroidism, making this test a valuable tool in the diagnostic process for various endocrine and metabolic disorders.