You can create masters for various types of Appointments. Appointment Type allows you to predefine the duration of the appointment, specify whether it's inpatient, and set colors to differentiate between different Appointment Types for analysis.
To Create an Appointment Type, go to:
Home > Healthcare > Consultation Setup > Appointment Type
The color will help you identify the appointments of a particular type in the Calendar view.
You can set up department-wise appointment/consultation charges in the Appointment Type.
If you want to set generic default charges and billing items, irrespective of any department, you can add a record in the Appointment Type Service Items table with no department selected.