Bilirubin, Direct is drawn in a SST at Quest, a Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma. at LabCorp, and a SST Tube at BioReference.
Lab comparison
Bilirubin, Direct: Quest vs LabCorp vs BioReference, tube, code & requirements
. This page shows collection requirements for all three major reference labs in one view, so you don’t have to cross-check three portals.
Always verify against your lab’s current collection manual before drawing.
Every value on this page is verified by a nurse practitioner in active clinical practice, not scraped from an automated source.
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| Requirement | Quest Diagnostics | LabCorp | BioReference |
|---|---|---|---|
| Test code | 285 | 001222 | 0044-8 |
| Primary tube | SST | Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma. | SST Tube |
| Specimen type | 1 mL serum - protected from light | Serum (preferred) or plasma | 2 mL SST Tube |
| Patient prep | None Specified | None Specified | None Specified |
| Minimum volume | Minimum volume 0.5 mL | Minimum Volume 0.7 mL (Note: This volume does not allow for repeat testing.) | Qty 1 |
Frequently asked questions
What is the Quest Diagnostics order code for Bilirubin, Direct?
The Quest Diagnostics order code for Bilirubin, Direct is 285.
What tube color does LabCorp use for Bilirubin, Direct?
LabCorp uses a Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma. for Bilirubin, Direct.
Does Bilirubin, Direct require fasting?
Bilirubin, Direct patient prep: None Specified. Always confirm with the ordering lab before the draw.
Data provenance
Source: Quest Diagnostics specimen collection manual, LabCorp directory of services, and BioReference laboratory collection guide.
Verified by: a licensed nurse practitioner in active clinical practice. Values are reviewed against each lab’s published collection requirements. Always confirm against your lab’s current manual before drawing.
Quest verified by: Mandi Boss B Franklin, Aug 29, 2026
LabCorp verified by: Mandi Boss B Franklin, Aug 29, 2026
BioReference verified by: Mandi Boss B Franklin, Aug 29, 2026
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