Abstract: A central health data repository stores health data from various data providers and provides data to various data consumers. The data hub is a standardized central repository that conforms to various standards, such as Health Level Seven (HL7). The data is received according to the HL7 specification and is transmitted to the various data providers using HL7. The data may also be transmitted as a continuous data feed. In this manner, a large volume of health data may be collected, stored, and disseminated using the data hub as a standardized service. A computer system includes one or more processors, an output network interface and an input network interface, a memory for storing multiple personal health records having fields for storing data in a proprietary format or in a standard format.