White Blood Cell (WBC) Count

Test ID: 

704405

CPT code:

85048

Synonyms:

Leukocyte Count
WBC
White Count

Clinical Use:

White cell enumeration; identify leukopenia and leukocytosis

Specimen Type:

Whole blood

Requested Volume: 

Tube fill capacity/0.5 mL (500 μL for pediatric microtainer capillary tubes; fill tube to capacity.)

Container Type: 

Lavender-top (EDTA) tube

Storage Instructions:

Maintain specimen at room temperature.

Stability Requirements:

Rejection Criteria

Hemolysis; clotted specimen; tube not filled with minimum volume; improper labeling; specimen received in any anticoagulant other than EDTA; specimen received with plasma removed; specimen diluted or contaminated with IV fluid; specimen received in whole blood transport tube