Total Bilirubin (Serum)

Why This Test Matters

Your doctor may order a total bilirubin test to check for conditions like jaundice (yellowing of skin/eyes), liver disease, or blockages in the bile ducts. High levels can signal problems with how your liver processes bilirubin, while low levels may indicate certain blood disorders or liver damage.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into a vein (usually in your arm) to draw blood. The process is quick and typically painless. If you’re nervous, let your healthcare provider know—they can offer comfort measures.

What the Results Mean

Results are usually reported in milligrams per deciliter (mg/dL). Elevated levels (above normal) may suggest liver issues, hemolysis (red blood cell breakdown), or bile duct blockages. Very low levels might indicate rare conditions like Gilbert syndrome or liver disease.

Common Conditions Linked to Bilirubin Levels

High bilirubin is often linked to jaundice, hepatitis, cirrhosis, or gallstones. Low bilirubin is less common but could be associated with hemolytic anemia or certain liver disorders. Your doctor will interpret results in the context of your symptoms and medical history.