MedUX is separated in modular parts to ensure the most possible flexibility. The core module provides everything an EMR must deal with (Patient management), but every other feature (diagnoses, billing etc.) is externalized into plugins. This enables 3rd party components to extend the functionality of MedUX.
Here is a list of currently available or planned MedUX modules (that have a wiki page). If you want to add one, see the instructions.