Complete Blood Count (CBC) Without Differential

CPT: 85027
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  • Hemogram

Test Includes

Hematocrit; hemoglobin; MCH; MCHC; MCV; RDW; red blood cell count (RBC); platelet count; white blood cell count (WBC)

Expected Turnaround Time

Within 1 day

Related Documents

Specimen Requirements


Whole blood


Fill tube to capacity.

Minimum Volume

0.5 mL (500 μL for pediatric microtainer capillary tubes; fill tube to capacity)


Lavender-top (EDTA) tube


Invert tube 8 to 10 times immediately after tube is filled at the time of collection.

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements



Room temperature

1 day


3 days



Freeze/thaw cycles


Causes for Rejection

Hemolysis; tube not filled with minimum fill volume; specimen drawn in any anticoagulant other than EDTA; specimens diluted or contaminated with IV fluid; clotted specimen; improper labeling; transfer tubes with whole blood; lavender-top (EDTA) tubes received with plasma removed

Test Details


Automated cell counter


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
028142 CBC, Platelet, No Differential 58410-2 005025 WBC x10E3/uL 6690-2
028142 CBC, Platelet, No Differential 58410-2 005041 Hemoglobin g/dL 718-7
028142 CBC, Platelet, No Differential 58410-2 015065 MCV fL 787-2
028142 CBC, Platelet, No Differential 58410-2 015081 MCHC g/dL 786-4
028142 CBC, Platelet, No Differential 58410-2 015172 Platelets x10E3/uL 777-3
028142 CBC, Platelet, No Differential 58410-2 015945 NRBC % 58413-6

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