CPT® Code 82240

A laboratory test identified by CPT® Code 82240 is utilized to measure the levels of bile acids, specifically cholylglycine. Bile acids are critical components of bile, which is a complex digestive fluid produced by the liver. This fluid not only contains bile acids but also includes water, electrolytes, cholesterol, phospholipids, and bilirubin, all of which play essential roles in digestion and metabolism. Cholylglycine itself is a specific type of bile acid that is formed through the conjugation of cholic acid with glycine. This compound serves a vital function in the digestive process as a fat emulsifier, aiding in the breakdown and absorption of dietary fats. The measurement of cholylglycine levels is particularly significant, as elevated concentrations can serve as a sensitive indicator of cholestasis—a condition characterized by impaired bile flow—and various hepatic diseases. Therefore, this test is crucial for diagnosing and monitoring liver function and related disorders.