CPT® Code 84578

Urobilinogen is a biochemical compound that results from the reduction of bilirubin, a substance produced during the breakdown of red blood cells. This reduction process primarily occurs in the intestine, where bilirubin is converted into urobilinogen. A small portion of urobilinogen is then reabsorbed from the intestine into the bloodstream and subsequently filtered by the kidneys, which is part of the enterohepatic urobilinogen cycle. The measurement of urobilinogen in urine is significant as it can provide insights into various hepatic and hematological conditions. Elevated levels of urobilinogen in urine may indicate several medical issues, including biliary obstruction, hepatic infections, poisoning, or inflammation, as well as hemolytic anemia. Additionally, elevated levels can occur in cases where there is a large hematoma that the body is in the process of absorbing. Conversely, decreased levels of urobilinogen may be observed in conditions such as congenital enzymatic jaundice or when urine acidifying drugs are present. For qualitative evaluation of urobilinogen, the CPT® code 84578 is utilized, while 84580 is designated for quantitative, timed specimen evaluations, and 84583 is used for semiquantitative evaluations.