The paper that tells you how much you need to pay the doctor
Bill
Special medicine your doctor wants you to take that you pick up from the pharmacy
Prescription
To call the doctor and make an appointment
Schedule an appointment
When you need more medicine
Refill
Medicine you can buy WITHOUT a prescription from the doctor
Over-the-counter medicine/OTC medicine
A call from one doctor to another, going to go to a different doctor for another appointment.
Referral
To make an appointment a different day or time
Change an appointment
To tell the doctor's office you are 100% sure you can come to the appointment
Confirm an appointment