This process is problematic, as far as I can gather from this thread:
Usually migrating EMR databases is very difficult / nearly impossible (besides migrating some limited demographic information or PDF’s) … and for practical purposes for a small clinic … nearly impossible from a cost standpoint. The way we have migrated information from NextGen’s Office (formerly Healthfusion) EMR is by exporting to PDF’s and storing those in an archival database. Then, we would populate the data into the the new charts on OpenEMR for upcoming appointments by manually cutting and pasting critical information into the new system.
Practice Fusion also has an article that speaks to the many concerns you will inevitably run into as you migrate. They seem to suggest that they have something better, but there seem to be a number of issues remaining.