Whether the total bilirubin 23.4μmol/L is normal or not needs to be differentiated, if the total bilirubin 23.4μmol/L is normal or low in newborns, and if the total bilirubin 23.4μmol/L is high in adults, the normal range of total bilirubin is 34~103μmol/L in 0~1 day old newborns. The normal range of total bilirubin is 34~103μmol/L for 0~1 day old neonates. Total bilirubin 23.4μmol/L is low in such cases, which can be seen in microcytic hypochromic anemia, aplastic anemia and so on. The normal range of total bilirubin in adults is 3.4-17.1 μmol/L. In this case, total bilirubin 23.4 μmol/L is high. High total bilirubin can be seen in hemolytic anemia, hepatocellular jaundice, drug-induced liver injury, primary biliary cirrhosis and other diseases. It is recommended to consult a doctor to determine the cause of the abnormal total bilirubin value.