Differential and Total WBC Count
| Differential and Total WBC Count | | | |
| Number | | 015173 |
| CPT | | 85004; 85048 |
| Synonyms | | Differential ; Leukocyte/WBC Count, Peripheral Blood ; WBC With Diff, Total and Differential ; White Blood Cell Morphology |
| Test Includes | | Total WBC plus relative (%) and absolute counts of all white blood cell types |
| Specimen | | Whole blood |
| Volume | | 3 mL (dependent upon whether cells are badly distorted by excess anticoagulant) |
| Container | | Lavender-top (EDTA) tube |
| Collection | | Invert immediately and mix with anticoagulant. |
| Storage Instructions | | Maintain specimen at room temperature up to 24 hours. Refrigerate up to 48 hours. |
| Causes for Rejection | | Hemolysis; clotted specimen; tube not filled with minimum volume; improper labeling |
| Use | | Determine quantitative variations in white cell numbers and types |
| Methodology | | Automated cell counter |
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