What a reminder has to say and how many are too many

The reminder is the cheapest message in the whole process, which is why it is the one most often over-sent. It has a single job: get the patient to the right place on the right day, in a state where they can be seen.

Content weighs more than count. If the message carries date and place but leaves out the exam preparation, the patient arrives and cannot be seen. That appointment is recorded as not performed and the slot is lost exactly as it would have been with a missed appointment.

The mix-up with appointment confirmation happens on its own in practice: teams count both as contacts, then cannot explain why the contact number went up and attendance stayed where it was.

How many reminders are too many?

The institution answers that before the first send, in writing, setting the ceiling per booked appointment, the permitted hours, the channel and what happens when the patient replies. In the US a federal ceiling already sits underneath that policy: the FCC caps healthcare messages at 1 per day to each patient and 3 voice calls or texts combined per week. Without that document, the argument about harassment happens after the complaint, which is the worst possible moment to have it. A patient who already confirmed does not need the same message three times, and one who never replied rarely changes their mind on the fourth send.