MDExchange

MDExchange is a system and subscriber service for the rapid and secure electronic transmission of communications between medical professionals.

• MDExchange functionality allows doctors to create correspondence using the Letter Writer, and send it via Secure Message Transport to other MDExchange users that are identified by searching the MDExchange online directory.
• MDExchange uses two services: HCN MDExchange Service for address book and account management, and HCN Relay Delivery Service for secure message transmission. Both of these services communicate externally (to the MDExchange servers) via SSL. Certificate identity is checked both ways – i.e. the server checks the client's certificate and the client also validates the server's certificate.
• Within the practice, the MDExchange client communicates to these services using named pipes connections. To allow this communication, you need Windows File and Printer Sharing ports opened in any firewall (which must be enabled for Clinical anyway, and is open by default in Windows firewall). The named pipe communication is authenticated where possible (within a domain) or is anonymous in a workgroup environment.