What is a "tickler" system used for?

What is a "tickler" system used for?
A . To interrogate the patient database
B . To alert staff to database errors
C . To organize patient billing
D . To remind patients of appointments

Answer: D

Explanation:

"Tickler" systems send out automatic appointment reminders to patients, either through automatically issued letters, emails, SMS or automated telephone calls. There will be a default setting for when and how often these will be sent out, but you should be aware of any patients who for some reason may need more frequent or more personal reminders.