Final answer:
The two most common pieces of correspondence that PARs send to patients are billing statements and appointment reminders.
Step-by-step explanation:
The two most common pieces of correspondence that Patient Account Representatives (PARs) send to patients are billing statements and appointment reminders.
Billing statements are sent to patients to inform them of the amount owed for medical services and to request payment. Appointment reminders are sent to remind patients of upcoming appointments and provide them with the necessary information.