 Today's health and health care are fragmented. Doctors use proprietary electronic health record systems. In those systems, they typically need to access a patient's diagnoses, test results, medications, and other data separately. Patients use a myriad of personal health apps and devices that also operate independently. Yet optimal health and health care require full data, the ability to see relevant connections and the knowledge to take actions based on them. We have developed Cognizant, a model to continually track what a patient is doing, where it is being done, and the data resulting. Cognizant is like a GPS navigator in the physical world and intended for both patients and their doctors. We use deep learning neural net models to generate context-appropriate knowledge and advice. We believe that like the GPS in other realms, Cognizant can be a game changer in the health care industry.