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You are here : AllRefer.com > Health > Tests & Exams > Bilirubin - blood : Normal Values & Results

Bilirubin - blood

Alternate Names : Total bilirubin - blood, Unconjugated bilirubin - blood, Indirect bilirubin - blood, Conjugated bilirubin - blood, Direct bilirubin - blood


Normal Values
  • Direct bilirubin: 0 to 0.3 mg/dL
  • Total bilirubin: 0.3 to 1.9 mg/dL

Note: mg/dL = milligrams per deciliter

Normal values may vary slightly from laboratory to laboratory.

What do Abnormal Results Mean?

Jaundice is a yellowing of the skin and the white part of the eye, which occurs when bilirubin builds up in the blood at a level greater than approximately 2.5 mg/dL. Jaundice occurs because red blood cells are being broken down too fast for the liver to process. This might happen due to liver disease or bile duct blockage.

If the bile ducts are blocked, direct bilirubin will build up, escape from the liver, and end up in the blood. If the levels are high enough, some of it will appear in the urine. Only direct bilirubin appears in the urine. Increased direct bilirubin usually means that the biliary (liver secretion) ducts are obstructed.

Increased indirect or total bilirubin may be a sign of:

Increased direct bilirubin may indicate:

Additional conditions under which the test may be performed:





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Review Date : 2/23/2009
Reviewed By : David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.



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