From an email thread:
Tim: How do you use billing in uemr?
Marcello: _Hi, Tim,
please send this inquire also to the forum.
We started to implement billing a few years ago, but feeling how complex and time consuming it would be we have stopped this effort to concentrate in the EMR module.
Are you interested in helping us to restart it?_
Tim: Probably yes. I am also interested in integration with other systems in general. Perhaps we should write an integration engine and use an open source billing module?