UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for Moffitt-Long and Mount Zion

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

WBC Count

Item Value
Approval req'd? No
Available Stat? Yes
Performed by Parnassus & Mt. Zion Hematology
In House Availability Test available 24 hours per day 7 days per week
Container type Lavender top
Amount to Collect 3 mL blood
Sample type EDTA whole blood
Min. Volume 1 mL blood (or 250 µL in a pedi-bullet)
Units x109/L
Normal range
0-24 hours 9.0-38.0 x109/L
24 hours-1 wk 5.0-34.0 x109/L
1 wk-6 months 5.0-21.0 x109/L
6 months -4 years 5.5-17.5 x109/L
4-14 years 4.5-15.5 x109/L
14-21 years 4.5-13.2 x109/L
> 21 years 3.4-10.0 x109/L
Critical value ≤ 1.5 x109/L or ≥ 100.0 x109/L will be telephoned if a new finding within the past 24 hours.
Synonyms Leukocyte count; white cell count; white blood cell count
Turn around times STAT 1 hour, Routine 4 hours
Last Updated 8/24/2011 12:30:37 PM
Entry Number 1008
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center