Despite spending more than $3 trillion a year on health care in the U.S., we do not yet have a way to easily access your complete medical history. The average hospital reinvests in MRI machines every five years or so at a cost of millions of dollars. Yet, comparatively little has been directed toward unlocking some of the most valuable information health insurers, physicians, and hospitals already have about you. The U.S. produces 1.2 billion clinical care documents annually, but nearly 80 percent of the data they contain is unstructured. This information is difficult for entities to understand and use. The medical chart contains a record of your health care — visits with doctors and hospitals, treatments, procedures, medications, diagnoses, and the results of workups. It is the key to understanding your health and improving the care provided to you. Yet, the challenge of accessing and making that information useable is immense.