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Test Code WBCCNT WBC LAB299

Important Note

If a differential is needed order WBC with Differential.

Test Method

Sysmex XN Systems:

  • WBC: Impedance counting

Specimen Requirement

EDTA whole blood is required.

Reference Values

WBC:

0-1 Year, Male and
Female:  6.0-17.5 thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

1-2 Years, Male and Female: 6.0-17.0
thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

2-4 Years, Male and Female:
5.5-15.5 thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

4-6 Years, Male and Female:
5.0-14.5 thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

6-8 Years, Male and Female:
4.5-13.5 thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

8-10 Years, Male and Female: 4.5-13.5
thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

10-16 Years, Male and Female: 4.5-13.0
thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

Adult Male and Female: 3.7-11.0
thou/mcL

  • Critical Value:

    •  
    • High: > 50.0
    •  
    • Low: < 1.0

 

Performance

Testing is performed Monday through Sunday.

Routine orders: Typically completed within 4 hours after the
specimen arrives at the testing site.

Expedite orders: Typically completed within 1 hour after the
specimen arrives at the testing site.

STAT orders: Typically completed within 30 minutes after
the specimen arrives at the testing site.

CPT Code Information

85048 Blood Counts: leukocyte (WBC),
automated

LOINC Code Information

6690-2 Leukocytes [#/volume] In Blood By Automated Count

Useful For

Screening tool to confirm a hematologic disorder.

Monitor effects of radiation or chemotherapy.

These counts are used as clinical guides in the diagnosis and/or
monitoring of many diseases.

Additional Specimen Collection Information

Whole blood collected in EDTA purple-top tube. The
tube must be at least one quarter full to be acceptable for
testing.

Capillary specimen collected in EDTA microtube. The 
tube must contain at least 375 mcl (bottom line) to be
acceptable for testing.
Refrigerate the specimen if unable to assay within 12 hours of
collection for microtainers, and 24 hours for
Vacutainers.