Answer

A great place to start looking for information on Regional Health Information Organizations (RHIOs), also know as Health Information Exchanges (HIEs), is the Healthcare Information and Management Systems Society (HIMSS) website

The HIMSS Health Information Resources site includes an Introduction to HIE Concepts, Case Studies, White Papers, and more.

Additional resource:

Phillips, A. B., Wilson, R. V., Kaushal, R., & Merrill, J. A.. (2013). Implementing health information exchange for public health reporting: A comparison of decision and risk management of three regional health information organizations in New York state. Journal of the American Medical Informatics Association21(e1), e173-e177. https://academic.oup.com/jamia/article/21/e1/e173/791649