White Blood Cell Count

Cleveland Heartlab B, Test, W


CPT Code: 85048
Order Code: 1378
Synonym: WBC
ABN Requirement: No
Specimen: EDTA Whole Blood
Volume:  4.0 mL
Minimum Volume:  1.0 mL
Container: EDTA (Lavender Top tube)


  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 8-10 times immediately after draw. DO NOT SHAKE.
  3. Do not centrifuge.

Transport: Store EDTA whole blood at 2°C to 8°C after collection and ship the same day per packaging instructions included with the provided shipping box.


Ambient (15-25°C): 2 days
Refrigerated (2-8°C):
3 days
Frozen (-20°C):
Not Acceptable


Causes for Rejection: Clotted samples; grossly hemolyzed samples; specimens other than EDTA whole blood; specimens with plasma removed; insufficient volume; contamination from IV fluid; improper labeling; samples not stored properly; samples older than stability limits

Turn Around Time:  1 to 3 days

Reference Range: See Laboratory Report

Clinical Significance: Most commonly utilized test to monitor characteristic response to infection. Diagnostically useful for diseases such as leukemia, leukocyte disorders, as well as monitoring therapy of these diseases.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.