White Blood Cell Count

Test Code

LAB299

Alias/See Also

1231400014

CPT Codes
85048

Includes

WHITE BLOOD CELL COUNT AUTOMATED

Preferred Specimen

EDTA Lavender top tube

Instructions

Collect in EDTA Lavender top tube. Invert immediately and gently mix with anticoagulant.

Transport Temperature

Room Temperature

Specimen Stability

Room Temperature: 24 hours
Refrigerated: 48 hours
Do not freeze. Specimens must be room temperature before analysis

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Clotted specimens

Methodology
AR,CW, HS, ST, DC, EL, MN, MV, VB Sysmex XN FS Coulter DXH DC Abbott Ruby

Reference Range

Males:
0-1 Day: 9.0-<30.0 K/cmm
1-7 Days: 9.4-<30.0 K/cmm
7-14 Days: >5.0-21.0 K/cmm
14 Days-1 Month: >5.0-20.0 K/cmm
1-6 Months: >5.0-19.5 K/cmm
6 Months-2 Years: 6.0-17.5 K/cmm
2-4 Years: 6.0-17.0 K/cmm
4-6 Years: 5.5-15.5 K/cmm
6-8 Years: 5.0-14.5 K/cmm
8-16 Years: 4.5-13.5 K/cmm
16-21 Years: 4.5-13.0 K/cmm
21 Years and above: 4.5-11.0 K/cmm
Females:
0-1 Day: 9.0-<30.0 K/cmm
1-7 Days: 9.4-<30.0 K/cmm
7-14 Days: >5.0-21.0 K/cmm
14 Days-1 Month: >5.0-20.0 K/cmm
1-6 Months: >5.0-19.5 K/cmm
6 Months-2 Years: 6.0-17.5 K/cmm
2-4 Years: 6.0-17.0 K/cmm
4-6 Years: 5.5-15.5 K/cmm
6-8 Years: 5.0-14.5 K/cmm
8-16 Years: 4.5-13.5 K/cmm
16-21 Years: 4.5-13.0 K/cmm
21 Years and above: 4.5-11.0 K/cmm

Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY LABORATORY

Last Updated: August 26, 2026

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.