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General Information
Alias: CBC, CBC with Diff, Differential, Complete
Performed: 24 hrs.
Turn Around Time: Med Emerg: 60 minutes; Routine: 4 hrs
CPT Codes: 85007 or 85004
Performed By: Hematology
Notes:
CBC may be ordered with or without a differential. If a differential is ordered, an automated differential is performed; parameters are reported in absolute numbers. A manual differential is only orderable by lab if indicated after auto diff performed; manual diff parameters are reported in percentages. A differential may not be ordered independent of a CBC. A Pathologist Referral will be performed if established criteria are present and further evaluation and/or interpretation is needed.
Testing is also performed in the Rapid Response Lab
Clinical Utility:
If a blood smear is necessary, it should be made and processed within 8 hours of collection for optimum results.
Characteristics that may affect test results: improper specimen collection technique, lipemia, icterus, hemolysis, cold agglutinins, and platelet clumps.
Link:
CBC and Differential Reference Ranges with Transgender Ranges
Unacceptable Conditions:
• Those containing clots
• Substandard mixing or collection
• Expired or improperly stored collection tubes
• Improperly filled tubes based on collection tube manufacturer’s guidelines
• Specimens contaminated with IV fluid
• Hemolyzed
• Improperly labeled
Components
Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
WBC |
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See above link to CBC and Differential Reference Ranges document to view reference range values and units of measure for all components of the CBC. |
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RBC |
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Hemoglobin |
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See above link to CBC and Differential Reference Ranges document to view reference range values and units of measure for all components of the Hemglobin . |
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Hematocrit |
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See above link to CBC and Differential Reference Ranges document to view reference range values and units of measure for all components of the Hematocrit. |
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MCH |
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MCHC |
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MCV |
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RDW-CV |
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MPV |
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Platelet |
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See above link to CBC and Differential Reference Ranges document to view reference range values and units of measure for all components of the Platelet Count. |
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NRBC Pct |
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RBC Morphology - Reflex test (Performed on CBC w Differential Orders Only. Performed on samples meeting laboratory approved criteria) |
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Manual Differential - Reflex Test (Performed on CBC w Differential Orders Only. Performed on samples meeting laboratory approved criteria) |
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Path Referral, BLD - Reflex Test (Performed on samples meeting laboratory approved criteria) |
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Specimen Requirements
Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
Blood |
Lavender EDTA(K2), 4mL |
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Fill tube to mark. Send to lab within 24 hours of collection.
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Room Temperature |
Send refrigerated to lab within 48 hours of collection |