Bilirubin is a yellow pigment formed from red blood cell breakdown and excreted in bile. High bilirubin levels in newborns can cause jaundice and may indicate various problems, while high bilirubin levels in adults can indicate liver or bile duct disorders. This article defines bilirubin and examines the causes of elevated bilirubin levels in adults and newborns. It also looks at the symptoms and treatment options for high bilirubin levels. Learn about the total bilirubin normal range and its implications for your health. Discover how it affects your well-being and what to watch for. Read more! What does it mean if your Bilirubin Direct result is too high? In adults, an elevated level of direct bilirubin typically points to a blockage or disease of the liver, bile ducts, or gallbladder.