A regional health information exchange: architecture and implementation.

The MidSouth eHealth Alliances health information exchange in Memphis, Tennessee provides access to data on almost 1 million individuals. The effort is the product of a comprehensive, integrated approach to technology and policy that emphasizes patient-centered use, low-cost, flexibility, and rigorous privacy and confidentiality policies and practices It is used in emergency departments and other major clinical settings. This paper provides a high-level overview of the system and its use.