Incidents are used in MacPractice to organize the patient's visits. It is best to think of the incident window as a timeline for the patient. The Patients Chart node will contain things that happened in the past, work that was completed outside of the office. The Completed Procedures will contain the present items that were completed per incident. The Treatment Plans would be the items for the future, the items that should happen for the patient during another visit.
...
This menu is also used for treatment plans. A user can create a new treatment plan for the patient from this menu. If there are multiple versions of a treatment plan, the Duplicate Treatment Plan should be used to help pull information forward into a new plan. Plans can also be hidden when they are marked as rejected, this can be helpful when a patient has many plans on their account.
...