complete blood count (CBC)

The complete blood count (CBC) is one of the most basic diagnostic tests used in clinical hematology for health status assessments. The CBC is comprised of:


  • WBC (white blood cell or leukocyte count)

  • RBC (red blood cell or erythrocyte count)

  • Hb (hemoglobin concentration)

  • Hct (hematocrit)

  • MCV (mean corpuscular volume)

  • MCH (mean corpuscular hemoglobin)

  • MCHC (mean corpuscular hemoglobin concentration)

  • RDW (red cell distribution width, the range of red cell sizes in one blood sample)

  • PLT (platelet count)

  • MPV (mean platelet volume)

  • The CBC with differential includes a separate listing of the five types of leukocytes.