Serum or plasma concentration of bilirubin (total)

Why Is This Test Done?

Your healthcare provider may order this test to check for liver problems, such as hepatitis, cirrhosis, or gallstones. It can also help diagnose conditions like jaundice (yellowing of the skin and eyes) or hemolytic anemia, where red blood cells break down too quickly. Sometimes, it’s used to monitor treatment progress for these conditions.

What to Expect Before the Test

You’ll typically have a small needle inserted into your arm to draw blood. No special preparation is needed, but let your provider know if you’re on blood thinners or have a history of bleeding issues.

What the Results Mean

Results are usually reported in milligrams per deciliter (mg/dL). High levels (above normal) may suggest liver disease, bile duct problems, or red blood cell breakdown. Low levels are less common but can occur with certain liver conditions or severe dehydration.

Common Conditions Linked to Bilirubin Levels

Elevated bilirubin is often linked to liver disorders (e.g., hepatitis, cirrhosis), blockages in the bile ducts, or conditions like sickle cell anemia or hemolytic diseases. Low levels may be due to liver dysfunction or other metabolic issues.