Test Directory

Clear All
Test Code
WBCMD
Test Name
White Blood Cell (WBC) Count with Manual Differential
CPT Codes
85007, 85048
Included Tests
  • White Blood Cell count (WBC)
  • Percent and Absolute Differential
  • Peripheral Smear Review

Reflexed when appropriate:

  • Hematopathologist interpretation when unclassified cells are present.
  • Gram stain confirmation when suspected bacteria or fungi are present.
  • Blood parasite confirmation when suspected organisms are present.
Expected Turnaround Time
1 day
Clinical Utility

Used in the evaluation of myelopoiesis, infection, toxic metabolic processes, and leukemic states.
Specimen and Container Info

Specimen Type: Whole Blood

Preferred Collection Container: Lavender Top (EDTA)

Alternate Collection Container: Microtainer, Lavender Top (EDTA) 

Desired Specimen Volume: 1mL

Alternate Specimen Volume: 0.5mL in Microtainer
Collection Instructions

Invert tube 8 - 10 times immediately after tube is filled at the time of collection.
Transport Instructions

Transport to the laboratory at room temperature within 24 hours, if testing cannot be performed within 24 hours of collection transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

24 hours

Refrigerated

48 hours
Causes for Rejection
  • Clotted specimen
  • Specimen contaminated with IV fluid
  • Quantity not sufficient for testing
Methodology
Automated Analyzer
Reference Intervals

Hematology Reference Intervals
Critical Values

HNL Lab Medicine Critical Values

Performing Location
1503 North Cedar Crest Surgery Center, 17th Street Hospital, 2310 Highland Avenue Surgery Center, Carbon Hospital, Cedar Crest Hospital, Cedar Crest Red Lab, Dickson City Hospital, Hazleton Hospital, Hecktown Oaks Hospital, Muhlenberg Hospital, Pocono Hospital, Redeemer Health, Roble Road Core Laboratory, Schuylkill Hospital, Tilghman Street Surgery Center
Alternate Names
  • WBC with Manual diff
  • White Cell with Manual Differential
Testing Schedule
Routine daily, STAT testing available
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.