Test Code WBCCNT White Blood Cell (WBC) Count, Blood, LAB299

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:
Preferred: 3 mL of EDTA whole blood
Specimen Volume: Minimum 0.5 mL of EDTA whole blood

Collection Instructions: Forward promptly.

Reference Values

WBC x 10³/µL or th/mm3
MALE		FEMALE
AGE	NORMAL	AGE	NORMAL
≥13 years	4.50 – 11.00	≥13 years	4.50 – 11.00
7 – 13 years	4.50 – 13.50	7 – 13 years	4.50 – 13.50
4 – 7 years	5.50 – 15.00	4 – 7 years	5.50 – 15.00
2 – 4 years	6.00 – 17.00	2 – 4 years	6.00 – 17.00
4 months – 2 years	6.00 – 17.50	4 months – 2 years	6.00 – 17.50
1 – 3 months	5.00 – 20.00	1 – 3 months	5.00 – 20.00
7 – 30 days	5.00 – 21.00	7 – 30 days	5.00 – 21.00
0 – 6 days	9.00 – 38.00	0 – 6 days	9.00 – 38.00

Critical Values:

	Less than	Greater than
WBC (0-30 days)	5.0 x 10³/µL	50.0 x 10³/µL
WBC (>30 days)	2.0 x 10³/µL	40.0 x 10³/µL

Day(s) Test Set Up

Monday through Sunday

Useful For

Determination of White Blood Cell Count

Methodology

Electronic Resistance Detection

Test Classification and CPT Coding

85048

Analytical Time

STAT within 1 hour upon receipt

Routine within 2 hours upon receipt