A complete blood count (CBC) is a blood test. It gives your provider information about your blood and overall health. CBCs help providers diagnose, monitor and screen for a wide range of diseases, conditions, disorders and infections. Your provider takes a sample of blood and your lab results are usually ready within a few days.
Overall CBC measures
The CBC measures the number of red blood cells (RBC), white blood cells (WBC), and platelets (PLT). Each of these types of blood cells performs important functions, so determining their levels can provide important health information.