Bilirubin, direct

CPT Code(s) 82248  Quest code 285

Methodology:  Spectrophotometry (SP)

Reference Range(s): ≤0.2 mg/dL

Clinical Significance

Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstruction. The assessment of direct bilirubin is helpful in the differentiation of hepatic disorders. The increase in total bilirubin associated with obstructive jaundice is primarily due to the direct (conjugated) fraction. Both direct and indirect bilirubin are increased in the serum with hepatitis.

Alternative Name(s) Conjugated Bilirubin

Preparation: No special preparation is needed. Fasting is not required for this blood test. In general, being well hydrated (drinking plenty of water before the blood draw) will help make your veins somewhat easier to locate and access for the blood draw

Please allow 1-2 business days for the results of this test.

For more Information on any of your lab test results

  • Consult your physician
  • Review the information on the independent, non-profit web site: www.labtestsonline.org

These are not intended as diagnostic comments, but only to give you sufficient information for further discussion with your physician. It is important that you promptly consult your physician regarding any abnormal findings.

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