This type is created when bilirubin attaches to (conjugates with) glucuronic acid in the liver before being excreted. This type of bilirubin is what makes your urine yellow. Total bilirubin. This refers to all of the bilirubin in your bloodstream. Your doctor might say you have low bilirubin levels if any of these are outside of the usual range.What can cause an elevated bilirubin?
Mononucleosis, cirrhosis and hepatitis can all cause liver damage and elevated bilirubin levels, as can diseases that block the bile ducts, including pancreatic cancer and gallstones. The rapid destruction of red blood cells from allergic reactions during a blood transfusion or sickle cell anemia may also cause levels to increase.