Lab comparison

Prolactin: 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.

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Every value on this page is verified by a nurse practitioner in active clinical practice, not scraped from an automated source.

RequirementQuest DiagnosticsLabCorpBioReference
Test code7460044650134-7
Primary tubeSerum separator 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 typeSerum (preferred) or plasma1 mL SST Tube
Patient prepOvernight fasting is preferredOvernight fasting is preferredOvernight fasting is preferred
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 Prolactin?

The Quest Diagnostics order code for Prolactin is 746.

What tube color does LabCorp use for Prolactin?

LabCorp uses a Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma. for Prolactin.

Does Prolactin require fasting?

Prolactin patient prep: Overnight fasting is preferred. 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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