Lab comparison
Zinc: 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.
| Requirement | Quest Diagnostics | LabCorp | BioReference |
|---|---|---|---|
| Test code | 945 | 001800 | 0285-7 |
| Primary tube | EDTA or sodium heparin (royal blue-top) tube | Royal blue-top (EDTA) tube or royal blue-top tube without EDTA | Blue-Royal Blue Trace Element Serum |
| Specimen type | 2 mL plasma collected in an EDTA or sodium heparin (royal blue-top) tube | Plasma (preferred) or serum | Blue-Royal Blue Trace Element Serum (**RED LINE**) |
| Patient prep | See lab specimen manual | See lab specimen manual | See lab specimen manual |
| Minimum volume | Minimum Volume 0.7 mL | Minimum Volume 0.4 mL | Not stated |
Frequently asked questions
What is the Quest Diagnostics order code for Zinc?
The Quest Diagnostics order code for Zinc is 945.
What tube color does LabCorp use for Zinc?
LabCorp uses a Royal blue-top (EDTA) tube or royal blue-top tube without EDTA for Zinc.
Does Zinc require fasting?
Zinc patient prep: See lab specimen manual. 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.
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