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Lab Dept:
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Hematology
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Test Name:
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CBC, PLATELET WITH DIFFERENTIAL
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General Information
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Lab Order Codes:
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CBC
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Synonyms:
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Complete Blood Count (CBC) with Differential; Complete Blood Count (CBC); CBC, Hemogram with Differential; Complete Blood Count (CBC), Platelet with Differential (PLTC)
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CPT Codes:
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85023 – Hemogram and platelet count, automated, and manual differential WBC count (CBC)
85025 – Hemogram and platelet count, automated, and automated complete differential WBC count (CBC)
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Test Includes:
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WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, Platelet Count, MPV, WBC Differential
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Logistics
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Test Indications:
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Useful for the evaluation of anemia, leukemia, reaction to inflammation and infections, peripheral blood cellular characteristics, state of hydration and dehydration, polycythemia, hemolytic disease of the newborn, and ABO incompatibilities.
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Lab Testing Sections:
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Hematology
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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4 hours
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Special Instructions:
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Do Not collect specimen while lipids are being infused or for 4 hours post-infusion.
Optimally, specimen should arrive in the lab within 4 hours of collection. Specimens can be stored at room temperature up to 24 hours.
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Lavender top tube (EDTA), Lavender MicrotainerŽ
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Draw Volume:
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2 mL in a short draw Lavender top tube
0.5 mL in Lavender MicrotainerŽ
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Processed Volume:
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Minimum: 0.5 mL blood
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Collection:
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Routine venipuncture or capillary draw
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Special Processing:
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Lab Staff: Do Not centrifuge
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Patient Preparation:
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None
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Sample Rejection:
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Improper tube, Clotted sample, Underfilled tube, Overfilled tube, Mislableled or Unlabeled specimens
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Interpretive
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Reference Range:
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Age and Sex Dependent; Refer to CBC Reference Value
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Critical Values:
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Test:
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Value
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Hem/Onc Clinics
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Hematocrit:
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<21% or >65%
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None
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Hemoglobin:
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<7.0 gm/dL
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<5.0 gm/dL
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Platelets:
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<50,000 or >1,000,000
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<5,000
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WBC:
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Newborn: <5,000 or >35,000
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None
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Others: <2,000 or >25,000
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None
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Differential/
Morphology:
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Presence of Blasts; however, if the presence of Blasts has been reported within the last 30 days no notification is necessary.
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Presence of Blasts; however, if the presence of Blasts has been reported within the last 30 days no notification is necessary.
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Limitations:
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Lipemia, elevated WBC and cold agglutinins will prolong the turn around time of an occasional specimen.
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Methodology:
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Automated Cell Counter
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Contraindications:
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Differential will not be done on samples with a WBC <0.5 x 103/uL
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References:
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Nathan, DG, et al (1987) Hematology of Infancy and Childhood, WB Saunders pp.1680-1688
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Normal Reference Range Study (1994) Children's Hospitals and Clinics, Minneapolis and St Paul, MN, Hematology Laboratory
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Updates:
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3/21/2011: Critical value statement for Blasts previously listed as “Presence of Blasts”.
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