| Test Name: | White Blood Cell Count (WBC) |
| Epic Order Code: | LAB299 | | |
| CPT Code: | 85048 | | |
| Specimen(s) Type: | Whole blood; 2.0 mL minimum volume |
| Acceptable Container(s): |  Tube top is purple (lavender). |
| Testing Schedule: | 24 hours/day, 7 days/week |
| Turn Around Time: | STAT: 1 hour | | |
| | Routine: 4 hours |
| Collection Information: | No special patient preparation is required. Collect specimen by standard phlebotomy procedures. |
| Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
| Reference Clients: | If unable to deliver to the lab immediately, store and transport specimen at 2-8° C. Specimen must be received in the lab within 24 hours. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport, grossly hemolyzed, clotted. |
| Reference Range: | Age | Male k/mm3 | Female k/mm3 |
| | 0 - 14 days: | 8.0 - 15.4 | 8.2 - 14.6 |
| | 15 - 30 days: | 7.8 - 15.9 | 8.4 - 14.4 |
| | 31 - 60 days: | 8.1 - 15.0 | 7.1 - 14.7 |
| | 61 - 180 days: | 6.5 - 13.3 | 6.0 - 13.3 |
| | 181 days - 2 yrs: | 6.0 - 13.5 | 6.5 - 13.0 |
| | 2 - 6 yrs: | 5.1 - 13.4 | 4.9 - 13.2 |
| | 6 - 12 yrs: | 4.3 - 11.0 | 4.3 - 11.4 |
| | 12 - 18 yrs: | 3.8 - 9.8 | 4.2 - 9.4 |
| | > 18 yrs: | 4.0 - 10.0 | 4.0 - 10.0 |
| Additional Information: | |