Appointment reminder message templates (WhatsApp + SMS)

What is an appointment reminder message template?

An appointment reminder message template is a fixed, pre-approved message with placeholders that your system fills in for each booking. On WhatsApp the placeholders are numbered {{1}}, {{2}} and so on, and the template must be approved by Meta in the utility category. On SMS in India the placeholders are written {#var#} and the template must be registered on a TRAI DLT portal against your 6-character header.

Because every outbound reminder has to match an approved template word for word, it pays to get the wording right once. The templates below are written for clinics, dental and physio practices and diagnostic labs, and can be pasted into Appointment Reminder App or any WhatsApp Business Platform provider. Adjust names and tone, but keep the structure.

Which template should you send, when and on which channel?

Send a confirmation at booking, a reminder about 24 hours before, and a short nudge on the day; everything else is situational. The table maps each template to its channel, timing and Meta category.

This table is general advice on sequencing. In Appointment Reminder App today, you send each template as a scheduled broadcast to a tag, segment or CSV-imported list (for example tomorrow's appointments), or push each booking from your clinic software through the REST API; patient replies land in the shared inbox. Automatic per-booking schedules, automatic SMS fallback when WhatsApp is undelivered and automatic calls to unconfirmed patients are on the roadmap.

Booking confirmation template

A booking confirmation tells the patient the slot is reserved and gives them everything they need to arrive. Send it within a minute of booking. If the patient booked by messaging you, it goes inside the free 24-hour customer-service window.

WhatsApp (utility)
Hello {{1}}, your appointment with {{2}} at {{3}} is booked for {{4}} at {{5}}.
Address: {{6}}
Reply here if you need to change it.

Sample values: {{1}} Priya, {{2}} Dr. Kumar, {{3}} Sri Ram Clinic, {{4}} 12 Oct 2026, {{5}} 10:30 am, {{6}} 14 Avinashi Road, Coimbatore

DLT SMS
Dear {#var#}, your appointment at {#var#} is booked for {#var#} at {#var#}. To change, call {#var#}. -SRCLNC

What should a 24-hour appointment reminder say?

A 24-hour reminder should name the patient, the doctor or service, the date, time and place, and give one clear way to confirm or change. On WhatsApp that is usually Confirm, Reschedule and Cancel quick-reply buttons, as in the generic example below. Appointment Reminder App currently uses reply keywords such as YES or CHANGE instead, and the reply lands in your shared inbox for staff (or the AI chat agent) to handle; quick-reply buttons are planned.

WhatsApp (utility), quick-reply buttons: Confirm | Reschedule | Cancel
Hi {{1}}, this is a reminder of your appointment with {{2}} tomorrow, {{3}}, at {{4}}.
Location: {{5}}
Please tap a button below to confirm, reschedule or cancel.

WhatsApp (utility), reply-keyword version used in Appointment Reminder App today
Hi {{1}}, this is a reminder of your appointment with {{2}} tomorrow, {{3}}, at {{4}}.
Location: {{5}}
Reply YES to confirm or CHANGE to pick another time.

DLT SMS fallback
Dear {#var#}, reminder: your appointment at {#var#} is on {#var#} at {#var#}. Reply YES to confirm or call {#var#} to change. -SRCLNC

Tamil version (24 h reminder)

வணக்கம் {{1}}, நாளை {{3}} அன்று {{4}} மணிக்கு {{2}} உடன் உங்கள் சந்திப்பு உள்ளது. இடம்: {{5}}. உறுதிப்படுத்த, நேரம் மாற்ற அல்லது ரத்து செய்ய கீழே உள்ள பொத்தானைத் தட்டவும்.
Buttons: உறுதி | நேரம் மாற்று | ரத்து

Hindi version (24 h reminder)

नमस्ते {{1}}, कल {{3}} को {{4}} बजे {{2}} के साथ आपकी अपॉइंटमेंट है। पता: {{5}}। पुष्टि करने, समय बदलने या रद्द करने के लिए नीचे बटन दबाएँ।
Buttons: पुष्टि करें | समय बदलें | रद्द करें

Submit each language as its own template with the correct language code (Tamil, Hindi, English). Patients in Madurai or Tirunelveli often respond faster to Tamil, and on WhatsApp the longer Unicode text costs nothing extra.

Same-day reminder template

A same-day reminder is a short nudge 2 to 3 hours before the visit, mainly for patients who have not yet confirmed. Keep it to two lines so it reads well on a lock screen.

WhatsApp (utility)
Hi {{1}}, see you today at {{2}} at {{3}}. Map: {{4}}
Reply here if you are running late.

DLT SMS
Dear {#var#}, your appointment at {#var#} is today at {#var#}. -SRCLNC

Fasting and preparation instructions (labs)

A preparation template tells the patient exactly what to do before a test, which avoids wasted visits and repeat samples. Send it the evening before. Keep instructions as variables so one template covers many tests.

WhatsApp (utility)
Hello {{1}}, your {{2}} test at {{3}} is tomorrow at {{4}}.
Before the test: {{5}}
Please bring {{6}}.
Reply here if you have any questions.

Sample values: {{2}} fasting blood sugar, {{5}} no food for 10 to 12 hours, water is allowed, {{6}} your doctor's prescription and previous reports

If patients reply with questions such as "can I take my BP tablet?", the AI chat agent answers only from knowledge-base text your clinic approves, hands medical questions to staff, and never replaces professional advice; staff should verify any answer about fasting or medicines. Diagnostic centres can see the full setup for appointment reminders for labs.

Pre-visit payment link template

A pre-visit payment template asks the patient to pay a deposit or consultation fee by UPI before the visit. It is utility, not marketing, because it relates to a booking the patient already made. In Appointment Reminder App this link can be the first step of the payment-recovery ladder (WhatsApp UPI link, then SMS, then an AI call, then hand-over to staff), which stops automatically when the payment webhook confirms payment and skips patients who opted out.

WhatsApp (utility), URL button: Pay now
Hi {{1}}, to confirm your appointment on {{2}} at {{3}}, please pay the {{4}} of ₹{{5}} using the UPI link below.

Sample values: {{4}} consultation fee, {{5}} 500

Missed appointment follow-up template

A missed-appointment message offers a new slot to someone who did not turn up, without blame. Send it 1 to 2 hours after the slot. Avoid discounts or offers; they push it into the marketing category.

WhatsApp (utility), quick-reply buttons: Book new time | Call me
Hi {{1}}, we missed you at your appointment with {{2}} today at {{3}}. Would you like to book a new time?

In Appointment Reminder App, ask the patient to reply with a day that suits them, or to type "call me" to receive an AI call back (Growth and Scale plans).

DLT SMS
Dear {#var#}, you missed your appointment at {#var#} on {#var#}. To rebook, call {#var#}. -SRCLNC

Reschedule confirmation template

A reschedule confirmation states the new slot clearly and, ideally, the old one, so there is no confusion. Send it as soon as the change is saved.

WhatsApp (utility)
Hi {{1}}, your appointment with {{2}} has been moved from {{3}} to {{4}} at {{5}}. Reply here if this does not suit you.

DLT SMS
Dear {#var#}, your appointment at {#var#} is now on {#var#} at {#var#}. -SRCLNC

What should an AI reminder call say?

An AI reminder call should identify the clinic, state the appointment, ask for a yes, reschedule or cancel, and hand over to a person for anything else. Keep the opening under 15 seconds. In Appointment Reminder App, AI voice calls are placed today when a patient types "call me", when staff click call from the inbox, as a call-back after a missed call, or as a step in the payment-recovery ladder, always within 9 am to 9 pm, on the Growth and Scale plans at ₹3.50 a minute. Automatic reminder calls to unconfirmed patients are on the roadmap. Use the script below as the call greeting.

"Vanakkam, this is the assistant from Sri Ram Clinic, calling for Priya. You have an appointment with Dr. Kumar today at 4:30 pm. Will you be able to come?"
If yes: "Thank you, we will see you at 4:30. You will get the location on WhatsApp."
If no: "Would you like a slot tomorrow morning or evening?" Then confirm the new time.
If unclear or a medical question: "Let me connect you to the front desk."

How do you get WhatsApp utility templates approved?

Write the template as a plain service message about one specific booking, with clear variables and realistic sample values. Rejections usually come from promotional wording in a utility template or from vague placeholders.

• Leave out promotional words such as offer, discount, free check-up, sale or "limited slots".
• Do not start or end the body with a variable, and do not place two variables side by side.
• Give sample values for every variable when you submit (name, date, time, address).
• Reference a transaction the patient started: their booking, test or payment.
• Keep one purpose per template; a reminder that also promotes a health package becomes marketing (≈ ₹0.88 instead of ≈ ₹0.13).

Our WhatsApp Business API guide for India explains categories and opt-in in more detail.

How do you register appointment reminder SMS formats on DLT?

Register each SMS template on your operator's DLT portal as service-implicit content, linked to your header, with every changing value replaced by {#var#}. The text you send must match the registered template exactly apart from the variables.

1. Register your entity and a 6-character header, for example SRCLNC.
2. Choose the content type for reminders (service-implicit), not promotional.
3. Write fixed text around {#var#}; operators commonly limit each variable to around 30 characters, so check your portal.
4. Register English and each regional-language version separately.
5. Store the template ID and map it in your sending platform; Appointment Reminder App stores the DLT template ID with each SMS template.

See the DLT, DND and DPDP compliance checklist for the full process.

What are the character limits for reminder templates?

WhatsApp template bodies allow up to 1,024 characters, and SMS is billed per segment. Practical limits:

• WhatsApp body: up to 1,024 characters; button labels up to 25 characters; header and footer text up to 60 characters.
• English SMS (GSM-7): 160 characters in one segment, 153 per segment when split.
• Tamil or Hindi SMS (Unicode): 70 characters in one segment, 67 per segment when split, at ₹0.18 per segment.

Aim for a reminder SMS under 160 English characters. Compare costs in SMS vs WhatsApp appointment reminders, then set up the sequence on WhatsApp appointment reminders with appointment reminder software for clinics. Plans start at ₹2,999 a month plus 18% GST, with a 14-day free trial including ₹200 wallet credit and no card; see pricing.

Questions people ask

What is the best format for an appointment reminder SMS in India?

The best format is one English segment of under 160 characters: name, clinic, date, time and a number to call, ending with your DLT header. Each changing value must be a {#var#} in the registered template. Appointment Reminder App sends these on DLT routes at ₹0.18 per segment.

Is an appointment reminder a utility or marketing template on WhatsApp?

It is a utility template, as long as it refers to a booking the patient made and contains no offers. Utility costs about ₹0.13 per delivered message versus about ₹0.88 for marketing. Adding a discount or package promotion can get the template recategorised or rejected.

Can I send appointment reminders in Tamil or Hindi on WhatsApp?

Yes. Submit each language as a separate template with its own language code. On WhatsApp a Tamil or Hindi template costs the same as English, about ₹0.13, unlike SMS where Unicode fits only 70 characters per segment. In Appointment Reminder App you can send each language version as a broadcast to the matching tag or segment, for example Tamil-speaking patients.

How long does WhatsApp template approval take?

Approval usually takes minutes to a day. Templates with clear variables, realistic sample values and no promotional words are approved fastest. Appointment Reminder App tracks the Meta status of each template, so you can see when one is approved or rejected, edit the wording and resubmit.

Can patients confirm an appointment by replying to a template?

Yes. In Appointment Reminder App today, patients reply with a keyword such as YES or CHANGE, and the reply lands in the shared inbox where the AI chat agent or your staff respond. Quick-reply buttons that update the booking automatically are planned. On SMS, patients can reply with a keyword if a reply route is set up, or call the number given.