Differential and Total WBC Count

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Turnaround Time: Within 1 day
CPT Code:

85048, 85004

Test Type: Whole blood, Tube fill capacity
Stability Time:

Temperature

Period

Room temperature

1 day

Refrigerated

3 days

Frozen

Unstable

Freeze/thaw cycles

Unstable

Overview:

Determine quantitative variations in white cell numbers and types.

Collection Details:

Collection Instructions:

Lavender-top (EDTA) tube.

Invert tube 8 to 10 times immediately after tube is filled at the time of collection.

Maintain specimen at room temperature for 24 hours; refrigerate for 48 hours.