RBC Count (Red Blood Cells)
Red blood cells (erythrocytes) carry oxygen from the lungs to tissues and return carbon dioxide for exhalation. RBC count is part of the complete blood count (CBC).
Low RBC (anemia) can result from blood loss, nutritional deficiency (iron, B12, folate), bone marrow disorders, or chronic disease. High RBC (polycythemia) can result from chronic hypoxia, dehydration, or myeloproliferative disorders.
What It Measures
Number of red blood cells per microliter of blood.
Reference Ranges
| Status | Range (M/µL) |
|---|---|
| Optimal | 4.5–5.0 M/µL (male), 4.0–4.5 M/µL (female) |
| Normal | 4.5–5.5 M/µL (male), 4.0–5.0 M/µL (female) |
| Borderline | 4.0–4.5 M/µL (male), 3.5–4.0 M/µL (female) |
| Out of Range | < 4.0 M/µL (male), < 3.5 M/µL (female) |
How GATOR Tracks This
Lab Providers
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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