Bilirubin, Direct

Test Code

DBILI

Alias/See Also

Conjugated Bilirubin, Direct Bilirubin, Bili direct

Preferred Specimen

1.0 mL plasma (0.5 mL minimum)

Instructions

Protect from light

Transport Container

PST (light mint green top). Red top and SST also acceptable

Specimen Stability

Room temperature: 8 hours, Refrigerated: 5 days, Frozen: 3 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Grossly hemolyzed specimens are unacceptable.

Reference Range

0.0 - 0.2 mg/dL
SGMC only: less than or equal to 0.3 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 block. 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 bilirubins are increased in the serum with hepatitis.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.