White Blood Cell Count
0040320
Ordering Recommendation
 
Mnemonic
WBC
Methodology
Automated Cell Count
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
One 5 mL lavender (EDTA) or pink (K2 EDTA).  
Specimen Preparation
Mix specimens thoroughly to avoid clotting of specimen.  
Storage/Transport Temperature
5 mL whole blood at 2-8°C.  (Min: 0.25 mL of thoroughly mixed whole blood)  
Unacceptable Conditions
Frozen or clotted specimens.  
Remarks
  
Stability
Ambient: 1 day; Refrigerated: 3 days; Frozen: Unacceptable  
Reference Interval
 
 
Age 1-​3 days 4-​7 days 8-​14 days 15-​30 days 31-​60 days 61-​180 days 6-​23 months 2-​5 years 6-​11 years 12  years and older
Male (K/µL) 6.8-​13.3 8.3-​14.1 8.2-​14.4 7.4-​14.6 6.7-​14.2 6.9-​15.7 6.2-​14.5 5.3-​11.5 4.5-​10.5 3.2-​10.6
Female (K/µL) 8.0-​14.3 8.8-​14.8 8.4-​15.4 8.3-​14.7 7.0-​15.1 6.8-​16.0 6.4-​15.0 5.3-​11.5 4.7-​10.3 3.2-​10.6
Interpretive Data
 
Note
 
CPT Code(s)
85048
Components
Component Test Code*Component Chart NameLOINC
0040320White Blood Cell Count6690-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • WBC Count