normal range for bilirubin in blood in adults
Hyperbilirubinemia results from a higher-than-normal level of bilirubin in the blood. For adults, this is any level above 170 Î¼mol/l and for newborns 340 Âµmol/l and critical hyperbilirubinemia 425 Âµmol/l.Mild rises in bilirubin may be caused by: 1  Hemolysis or increased breakdown of red blood cells.yperbilirubinemia results from a higher-than-normal level of bilirubin in the blood. For adults, this is any level above 170 Î¼mol/l and for newborns 340 Âµmol/l and critical hyperbilirubinemia 425 Âµmol/l. Mild rises in bilirubin may be caused by: 1  Hemolysis or increased breakdown of red blood cells.