This document provides an overview of health information exchange (HIE) and the Michigan Health Information Network (MiHIN). It defines HIE as the electronic sharing of health information and organizations that enable this sharing. Benefits of HIE include improved patient outcomes, fewer medical errors, and lower healthcare costs. MiHIN facilitates HIE across Michigan through a network of connected organizations. It provides shared services to enable the secure electronic sharing of clinical summaries, lab results, immunization records and other health data to improve care coordination.