Class diagram

  

Patients call the doctor’s office to request an appointment.
An appointment secretary handles the calls and passes the patient off to a nurse practitioner if it 
is an emergency.
For old patients, the appointment secretary accesses the patient’s record from the patients records 
database. For new patients, the appointment secretary collects basic information like name, age, 
and insurance carrier from the caller and creates a basic patient record.
The appointment secretary accesses the doctors and health practitioners schedules database and 
schedules an appointment for the patient. The appointment secretary then accesses the scheduled 
appointment database and updates the appointment schedules as appropriate.