Apr 3, 2015




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Hematology

White Cell Count

White Cell Count (WBC) Hematology Lab Test

Name: White Cell Count

Test Name: White Cell Count

Health Link Test Code: WBC

LIS Test Code: WBC

CPT Code(s): 85048

Included In: White Cell Count and Differential, CBC with Differential, CBC without Differential

Methodology: Flow Cytometry and Impedance

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Blood

Collection Container: K3EDTA-Lavender top

Also Acceptable: K2EDTA-Lavender top, Pink top tube

Collection Volume: 4 mL

Pediatric Collection Volume: 1 mL

Stability Ambient:

24 hours

Stability Refridgerated:

Not acceptable

Stability Frozen:

Not acceptable

Sample Analyzed: Whole Blood

Testing Volume: 1 mL

Pediatric Testing Volume: 0.25 mL in microtainer

Specimen Transport:

Transport specimen to laboratory at ambient temperature.

Unacceptable Criteria:

Clotted specimens are not acceptable. Tubes with <25% of fill volume.





0-29 days  9.1-34.0
30 days - 23 months  6.0-14.0
2-9 years  4.0-12.0
10-17 years  4.0-10.5
18 years and up  3.8-10.5

Interpretation Type: Reference Interval

Critical Calls: yes