Dec 19, 2016




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

White Cell Count and Differential

White Cell Count and Differential (WBCD) Hematology Lab Test

Name: White Cell Count and Differential

Test Name: White Cell Count and Differential

Health Link Test Code: WBCD

LIS Test Code: WBCD

CPT Code(s): 85048, 85004

Test Component:

White blood cell count and WBC Differential. Use of manual microscopy for WBC differential is determined by laboratory personnel during testing.

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:

Differential - 8 hours. WBC - 24 hr

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.


For reference interval information, see individual tests.

Interpretation Type: Reference Interval

Additional Information:

Differential results may be delayed if a hematopathology review is warranted.  A professional fee may be associated with this test.