White Blood Cell (WBC) Count CPT: 85048
Expected Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Tube fill capacity
0.5 mL (500 μL for pediatric microtainer capillary tubes; fill tube to capacity.)
Lavender-top (EDTA) tube
Invert tube 8 to 10 times immediately after tube is filled at the time of collection.
Maintain specimen at room temperature.
To screen for or diagnose a variety of conditions that can affect the number of white blood cells (WBCs), such as an infection, inflammation or a disease that affects WBCs; to monitor treatment of a disorder or to monitor therapy that is known to affect WBCs.
As part of a complete blood count (CBC), when you have a routine health examination; when you have signs and symptoms that may be related to a condition affecting the number of WBCs; when you have a condition or are receiving treatment that is known to affect WBCs.
A blood sample drawn from a vein or by a fingerstick (children and adults) or heelstick (newborns).