Blood
RDW (Red Cell Distribution Width)
RDW measures the variation in size of red blood cells. Elevated RDW indicates the body is producing red blood cells of different sizes, often due to iron deficiency, B12/folate deficiency, or mixed anemias.
RDW is also an emerging independent predictor of cardiovascular mortality.
What It Measures
Coefficient of variation of red blood cell volume.
Reference Ranges
| Status | Range (%) |
|---|---|
| Optimal | 11.5–13.5% |
| Normal | 11.5–14.5% |
| Borderline | 14.5–16.0% |
| Out of Range | > 16.0% |
How GATOR Tracks This
Lab Providers
Function HealthLabCorpQuest
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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