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BCH Order Code WBCDF White Blood Cell (WBC) Count with Differential, Blood

Performing Laboratory

Boulder Community Health

Specimen Requirements

Container/Tube: 4 mL Lavender-top (EDTA) tube(s) or 2 mL Lavender-top (EDTA) tube(s)

Specimen Volume: 2 mL (minimum) of EDTA whole blood or 1 mL (minimum) of EDTA whole blood
Collection Instructions: Immediately invert 5 times to mix blood

Specimen Transport Temperature

Ambient

Reference Values

WBC

0 days: 9.4-34.0 × 103/mm3

1 day: 5.0-19.5 × 103/mm3

1 month: 6.0-17.5 × 103/mm3

3 years: 4.5-13.5 × 103/mm3

≥13 years: 3.83-9.27 × 103/mm3

Critical values (automatic call-back): <1.0 × 103/mm3 or >50.0 × 103/mm3

LYMPHOCYTES

Percent: 16.9-49.3%

Absolute: 1.03-2.93 × 103/mm3

MONOCYTES

Percent: 3.1-8.8%

Absolute: 0.17-0.55 × 103/mm3

NEUTROPHILS

Percent: 39.3-74.2%

Absolute: 1.68-6.16 × 103/mm3

EOSINOPHILS

Percent: 0.6-7.6%

Absolute

0 days: 0.02-0.85 mm3

1 day: 0.02-0.70 mm3

≥1 year: 0.03-0.4 mm3

BASOPHILS

Percent: 0.3-1.7%

Absolute

0 days: 0.0-0.4 × 103/mm3

≥2 weeks: 0.02-0.1 × 103/mm3

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

85007