White Blood Cell (WBC) Count

White Blood Cell(WBC) Count

CPT Test code: 85048

Specimen: Whole blood
Volume: Tube fill capacity
Minimum Volume: 0.5 mL
Container: Lavender-top (EDTA) tube
Collection: Invert tube immediately 8 to 10 times once tube is filled at time of collection.
Storage Instructions: Maintain specimen at room temperature.
Causes for Rejection: 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
Use: White cell enumeration; identify leukopenia and leukocytosis