Bilirubin Direct
Test Code
BILID
Description
Bilirubin, Direct - 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.
Collect
Plain red top or SST tube.
Preferred Volume: 1 mL serum
Pediatric Collection
Minimum volume: 0.1 mL serum
Unacceptable Conditions
Direct exposure to sunlight
Storage Transport Temp
Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate serum from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube. Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Stability after cell separation:
8 hours at RT (15-25°C)
2 days at 2-8°C
3 months frozen at ≥ -20°C
Performed
Monday - Friday
Methodology
Diazo
Turnaround Time
4 hour routine, 1 hour STAT
Department
Core Lab
Synonyms
Diazo (Direct Bilirubin, Serum), BILID
Study Offerings
Not offered
Reference Interval
Newborn - 13 days: 0.0 - 0.9 mg/dL
14+ days: 0.0 - 0.2 mg/dL
CPT Code
82248
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared