Bilirubin direct

Test Code

BILIRUBIN DIRECT

Alias/See Also

Direct bilirubin
Chemistry

Preferred Specimen

Light Green Top Tube -Plasma

Minimum Volume

2 mL

Other Acceptable Specimens

Gold Top Tube

Transport Temperature

Refrigerate

Specimen Stability

If protected from bright light --
Room temperature: 2 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C or colder): 3 months

Methodology
Diazonium Salt

Setup Schedule

M-F

Report Available

TAT 1 - 3 days

Reference Range

0.0 - 0.5 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.

Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973

Last Updated: April 3, 2019

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.