this question is vague, but I am working on integrating openEMR with other health information networks an am using HL7 and Mirth. There is some support for HL5, see the “Proceedures” tab as admin, and there is a form called “Proceedure Order” to send requests.
If anyone has anything to add, I’m all ears since HL7 comes in many flavors V 2.x and v3, and there a many message types which need to be processed, request, processing their ACK, and results. Mirth can directly write to the openEMR database.