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Test Code WBC White Blood Cell Count

Additional Codes

Epic Code

LAB299

Performing Laboratory

Bronson Laboratory Services-Hematology

Reference Values

WBC

  • 0-1 day: 9.0-38.0 × 103/µL
  • 2-6 days: 5.0-30.0 × 103/µL
  • 7-14 days: 5.0-21.0 × 103/µL
  • 15-30 days: 5.0-20.0 × 103/µL
  • 1-6 months: 5.0-19.5 × 103/µL
  • 6 months-2 years: 6.0-17.5 × 103/µL
  • 2-6 years: 5.0-17.0 × 103/µL
  • 6-12 years: 4.0-14.5 × 103/µL
  • >12 years: 4.0-11.0 × 103/µL

Critical values (automatic call-back): ≤1.0 x 103/µL, or ≥100 x 103/µL

Methodology

Includes WBC only

Note: Differential is not included. To obtain a differential with a complete blood count
(CBC), the order must be written as “CBC with
differential.”

Specimen Requirements

Specimen Type: Whole blood

Container/Tube: Lavender top
(EDTA)-Lavender-top (EDTA) MICROTAINER is also acceptable.

Specimen Volume: 3 mL

Specimen Minimum Volume: 1 mL or 0.4 mL in
EDTA MICROTAINER

Collection Instructions:

1. Gently invert 10 times to mix blood.

2. Causes for rejection include clotted specimen
or quantity not sufficient.

Specimen Transport Temperature

Refrigerate

Day(s) Test Set Up

Monday through Sunday