Serum/plasma mass concentration of total bilirubin

Why Is This Test Done?

Your healthcare provider may order this test to check for liver disease, such as hepatitis, cirrhosis, or bile duct blockages. It can also help diagnose conditions like hemolytic anemia, where red blood cells break down faster than usual. Sometimes, it’s used to monitor treatment progress or screen for genetic disorders affecting bilirubin metabolism.

What to Expect Before the Test

No special preparation is needed. You may have a blood sample drawn from a vein in your arm, similar to other blood tests. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

High bilirubin levels may suggest liver problems, jaundice (yellowing of skin/eyes), or other conditions affecting red blood cell breakdown. Low levels are less common but could indicate liver disease or certain genetic conditions. Your provider will discuss results in the context of your health history.

Common Conditions Linked to Bilirubin Levels

Elevated bilirubin is often linked to liver issues (e.g., hepatitis, gallstones), red blood cell disorders (e.g., anemia), or blockages in the bile ducts. Low levels are rare but may signal liver dysfunction or specific genetic disorders.