Doctors are busy people, and just because one doctor refers a patient to a specialist, that doesn't mean he or she will have the time to explain what's going on. If you see several doctors, each may keep a separate chart for you. You could be subjected to the same diagnostic test several times, which is a waste of money and time. With access to an electronic medical record that provides the big picture, one doctor will know what all other doctors in your life have done, what's worked and what hasn't. This will help medical professionals make more precise diagnoses and manage treatments for chronic diseases.