Urobilinogen

**Definition:** A colorless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidized to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. At times, it is re-excreted in the urine, where it may be later oxidized to urobilin.

**Tree numbers:** - D03.383.129.578.840.249.852 - D03.633.400.909.249.852 - D04.345.783.249.852 - D23.767.193.852