Medisoft/Lytec both have EHR sides but most practices use the Practice Management side for billing. Part of problem is that there isn't much feedback going to AC as to what to do next. A lot of tech companies are chasing industry buzzwords.
What I hear from most docs is that they want to improve efficiency and streamline features. (not add a ton of new ones) I really wish they would've chose a company that uses a similar design language to their EHR for billing. Most practices I've worked with were not huge fans of ACPM/MedFx. Most offices that do in-house billing seem to be running Medisoft. External billers with AC seem to prefer EdgeMed. Might be good for AC to research that and build tighter integration.