Laboratory Services

White Blood Cell Count and Differential

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Updated Test Information:

Test Description
White Blood Cell Count and Differential
Test ID
WBC
Specimen Type

Whole Blood

Specimen Requirements

Lavender

Specimen Collection / Processing Instructions

Lavender - Invert tube 8 to 10 times immediately after collection

Minimum Sample Volume

0.5 mL of Whole Blood

Pediatric Min. Volume (if applicable)

500 μL for pediatric microtainer capillary tubes; fill tube to capacity.

Stability

Room Temperature: 1 day
Refrigerated: 2 days
Frozen: Unacceptable

Unacceptable Specimen Conditions

Hemolysis; clotted specimen; specimen drawn in any anticoagulant other than EDTA; specimen diluted or contaminated with IV fluid; tube not filled with minimum volume; improper labeling; transfer tubes with whole blood; specimen received with plasma removed.

Methodology

Automated/Manual

Estimated TAT

0-2 Days

Testing Schedule

Monday-Saturday & STAT

CPT Code(s)

85004 and 85048

Reference Range

Reflex Conditions

Pathologist Diff Impression will be reflexed on abnormal result findings and by Add-On request

Performing Lab

Incyte Diagnostics

LOINC Code(s)

6690-2