Lab comparison

Insulin-like Growth Factor 1 (IGF-1): 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.

RequirementQuest DiagnosticsLabCorpBioReference
Test code162930103631072-8
Primary tubeCollect blood in a red-top tube (no gel) or serum separator tube (SST).Red-top tube or gel-barrier tubeSST Tube
Specimen type0.5 mL serumSerum1 mL SST Tube
Patient prepNone SpecifiedNone SpecifiedNone Specified
Minimum volume
Minimum volume
0.3 mL
Minimum Volume
0.2 mL (Note: This volume does not allow for repeat testing.)
Qty
1

Frequently asked questions

What is the Quest Diagnostics order code for Insulin-like Growth Factor 1 (IGF-1)?

The Quest Diagnostics order code for Insulin-like Growth Factor 1 (IGF-1) is 16293.

What tube color does LabCorp use for Insulin-like Growth Factor 1 (IGF-1)?

LabCorp uses a Red-top tube or gel-barrier tube for Insulin-like Growth Factor 1 (IGF-1).

Does Insulin-like Growth Factor 1 (IGF-1) require fasting?

Insulin-like Growth Factor 1 (IGF-1) 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.

Need the full lookup, not just a comparison?

No login · Zero PHI · Clinician-verified · Quest + LabCorp + BioReference.

Try a lookup

Related: why lab specimens get rejected, and how to prevent it

← All comparison guides