WBC Count (White Blood Cells)
White blood cells (leukocytes) are the immune system cellular defense. The total WBC count is a broad screening tool — the differential (neutrophils, lymphocytes, monocytes, eosinophils, basophils) provides specificity.
High WBC (leukocytosis) most commonly indicates infection or inflammation. Low WBC (leukopenia) can indicate viral infection, autoimmune conditions, bone marrow disorders, or medication effects.
What It Measures
Total number of white blood cells per microliter of blood.
Reference Ranges
| Status | Range (K/µL) |
|---|---|
| Optimal | 4.5–7.0 K/µL |
| Normal | 4.5–11.0 K/µL |
| Borderline | 3.5–4.5 K/µL or 11.0–15.0 K/µL |
| Out of Range | < 3.5 K/µL or > 15.0 K/µL |
How GATOR Tracks This
Lab Providers
Related Clinical Ratios
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.
Track WBC Count in GATOR
Import your lab results and see how this biomarker trends over time with AI-powered context.
Get Started Free