How far in advance should the first reminder go?

Around 48 hours. Far enough that the patient can still rearrange their day, and far enough that you can offer the slot to someone else if they cannot. A week ahead is too early to be acted on; the morning of is too late to be useful to you.

Is it worth asking patients to confirm?

Rarely. Confirmation replies are sparse, and a missing reply tells you nothing — you cannot tell the patient who is coming from the one who never read it. An easy way to cancel produces information you can act on; a request to confirm mostly produces silence.

Should reminders mention the treatment?

No. Say when and where, never what. The message is read on a lock screen, in a shared kitchen, on somebody else's phone. The speciality alone can be a disclosure.

It is where many patients actually read things, and it comes with rules about templates and opt-in that differ from SMS. If you use it, keep it as an additional channel rather than the only one — a patient who has not accepted your number still needs the reminder.

Appointment reminders: what to send, and when

Most reminder templates you find are a time, a date and the word "please". They are polite and they do nothing, because a reminder is not a courtesy — it is the last chance to move an appointment that is about to be wasted.

Below are the two messages worth sending, written out so you can copy them. Placeholders are in braces; every system that sends these has some version of them.

What every reminder has to contain

Who it is from. A message that opens with a date and no clinic name reads as spam and is deleted as spam.
When, in words the patient can act on. "Thursday 21 August at 14:30" beats "21/08 14:30".
Where. Including which branch, if you have more than one. This alone prevents a category of lateness.
A way out. A link or a number that cancels or reschedules without a conversation.
Anything they must bring or do. Fasting, documents, arriving early for paperwork.

Important

What must NOT be in it: why they are coming. A message saying which clinic and which procedure is a disclosure to whoever picks up the phone — a partner, an employer, a family member. Say when and where; never say what.

The 48-hour message

This one exists so the patient can rearrange, and so you have two days to sell the slot if they do. Send it as email if you have one — there is room for detail — and as SMS if you do not.

SMS

{clinic}: your appointment is on {day} {date} at {time}, {branch}.
Need a different time? {link}

Email

Subject: Your appointment on {day} at {time}

Hello {first name},

This is a reminder of your appointment at {clinic}:

  {day} {date}, {time}
  {branch}, {address}

If the time no longer works, you can move or cancel it here:
{link}

Moving it two days ahead lets us offer the slot to somebody
on the waiting list, so please do use the link rather than
leaving it.

{clinic}
{phone}

The last paragraph is doing real work. Telling a patient that cancelling helps somebody else converts a small number of silent no-shows into cancellations, which is exactly the trade you want.

The day-of message

Different job: this one gets somebody out of the door. Short, SMS, sent the evening before or the same morning. No paragraphs — it will be read on a lock screen.

{clinic}: today at {time}, {branch}. {map link}
Can't make it? {link}

If your appointments need preparation, this is where it goes, not in the 48-hour one — nobody remembers on Tuesday what they were told on Sunday.

{clinic}: today at {time}, {branch}.
Please don't eat or drink for 6 hours before.
Can't make it? {link}

Wording that quietly backfires

Instead of	Write	Why
Please confirm your attendance	Need a different time? {link}	Asking for a reply gets no reply and tells you nothing. Offering an exit gets you the cancellations.
Failure to attend may incur a charge	If you cannot come, please move it — the slot goes to someone waiting	The threat makes the anxious patient cancel and the indifferent one shrug.
Your dermatology appointment	Your appointment at {clinic}	The speciality is a disclosure to whoever sees the screen.
Reply STOP to opt out	A link to your own preferences page	STOP usually unsubscribes the patient from everything, including the reminder they actually wanted.

Timing, channel, and how many

Two, not three. A third message trains people to ignore the first two.
Not at 07:00, not after 21:00. A reminder that wakes somebody is remembered for the wrong reason.
Match the channel to the job. Email for the one that carries detail, SMS for the one that carries urgency.
One language per patient. The one they booked in — a reminder in the wrong language is an unread reminder.

A reminder for an appointment the patient booked is not marketing, and most privacy regimes treat it as part of providing the care. What turns it into marketing is adding anything you would like them to buy — an offer, a new treatment, a review request bolted onto the end.

Keep the two apart. Reminders go to everybody who has an appointment; anything promotional goes only to people who agreed to it, and can be switched off without switching off the reminders. Mixing them is how a clinic loses the ability to send either.

Note

This is a general shape, not legal advice, and the details differ by country. If you operate in more than one, the strictest of them is the cheapest rule to build against.

Before you send a single one

Send both messages to yourself, on a phone, not on a desktop.
Check the link works while logged out — most cancel links are tested by someone still signed in.
Check the name renders when the patient has one name, or a very long one.
Check what happens to an appointment that is moved after the 48-hour message has gone: the second reminder must carry the new time.

That last one is the failure people find in production. A patient who reschedules and then receives a reminder for the old time stops trusting the messages entirely, which costs you more than the no-show did.

Common questions

How far in advance should the first reminder go?: Around 48 hours. Far enough that the patient can still rearrange their day, and far enough that you can offer the slot to someone else if they cannot. A week ahead is too early to be acted on; the morning of is too late to be useful to you.
Is it worth asking patients to confirm?: Rarely. Confirmation replies are sparse, and a missing reply tells you nothing — you cannot tell the patient who is coming from the one who never read it. An easy way to cancel produces information you can act on; a request to confirm mostly produces silence.
Should reminders mention the treatment?: No. Say when and where, never what. The message is read on a lock screen, in a shared kitchen, on somebody else's phone. The speciality alone can be a disclosure.
What about WhatsApp?: It is where many patients actually read things, and it comes with rules about templates and opt-in that differ from SMS. If you use it, keep it as an additional channel rather than the only one — a patient who has not accepted your number still needs the reminder.

Or stop sending them by hand.

Clinic+ sends both messages on your schedule, in the language the patient booked in, with a link that moves the appointment and offers the freed slot to the waiting list. Free to start, no card.

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