Answers
    Follow-ups & retention

    Is sending automated WhatsApp messages to patients legal in India?

    Last reviewed: 27 September 2026 Gaurav, Founder, Vaidya OS
    Quick answer

    Yes, if you follow two sets of rules. WhatsApp's own policy requires a business to get a person's permission before messaging them, and to stop when they ask. India's DPDP Act 2023 requires consent for using personal data, for a stated purpose. Appointment and follow-up reminders for a visit the patient agreed to are the safest case. Promotions need clearer consent.

    In this answer

    Automated WhatsApp messages to patients are allowed, within rules. This is general information, not legal advice. If you are unsure about a specific message, ask a lawyer.

    WhatsApp's rules

    • Permission first. WhatsApp's Business Messaging Policy lets a business message a person only if that person gave their number and agreed to receive messages.
    • Approved templates. A business can reply freely only within 24 hours of the patient's last message to it. Anything else, such as a reminder, must use a template approved by Meta. Templates fall into three types: utility (such as reminders), marketing and authentication.
    • Respect opt-outs. The policy says a business must respect every request to stop.
    • Blocks count against you. Patients can block or report a business, and WhatsApp may then limit how many messages that business can send.
    • No unofficial tools. Tools that automate WhatsApp Web break WhatsApp's terms and put the number at risk of a ban.

    India's DPDP Act 2023

    • A patient's phone number is personal data.
    • Consent must be free, specific and informed, and given by a clear action, such as ticking a box or signing.
    • Use the number only for the purpose the patient agreed to, such as reminders about their care.
    • Patients can withdraw consent, and withdrawing should be as easy as giving it.
    • Keep a record of who agreed, when, and to what.
    • Do not share numbers with others without consent.

    What is safest

    • Lower risk: appointment reminders, follow-up reminders and messages about the patient's own care.
    • Needs clearer consent: promotions, festival offers, new service announcements and newsletters.

    An example: consent at registration

    1. At registration, the patient reads one plain line, such as "I agree to receive appointment and follow-up reminders from this clinic on WhatsApp", and agrees to it.
    2. The clinic saves the date and the exact wording the patient agreed to.
    3. The day before the patient's next visit, a reminder goes out. That is care the patient asked for, so it is the lower-risk case.
    4. Months later, the clinic wants to announce a health camp. That is closer to promotion, so it goes only to patients who agreed to hear clinic news, not to everyone on the list.
    5. One patient replies STOP. From then on, that patient gets no automatic messages.

    What gets clinics in trouble

    • Messaging a bought or borrowed list of numbers.
    • Sending promotions without consent.
    • Ignoring patients who ask to stop.

    With Vaidya OS

    On a paid plan, reminders go out from the one shared Vaidya OS WhatsApp number, using utility templates approved by Meta. The 14-day free trial sends no automatic WhatsApp messages. The Vaidya OS QR consent form saves each patient's consent with the exact wording they saw. If a patient replies STOP, Vaidya OS stops sending them automatic messages.

    Read whether you need your own WhatsApp Business API or how follow-up reminders work.

    Related questions

    Do I need patient consent to send appointment reminders?
    Get it. WhatsApp requires opt-in before a business messages someone, and the DPDP Act requires consent for using personal data. A consent step at registration or check-in covers this.
    Can I send festival greetings or offers to all my patients?
    Only to patients who agreed to receive that kind of message. Promotional messages need clearer consent than reminders about their care.
    What should the consent line say?
    One plain sentence that names WhatsApp and the purpose, for example reminders about appointments and follow-ups. Ask separately before sending anything promotional.
    What if a patient asks me to stop messaging them?
    Stop at once. WhatsApp's policy says a business must respect every request to stop. In Vaidya OS, a patient who replies STOP gets no more automatic messages.

    Sources

    1. DPDP Act 2023
    2. WhatsApp Business Messaging Policy
    3. WhatsApp Business Platform pricing and template categories (Meta)
    G
    Gaurav
    Founder, Vaidya OS
    Last reviewed 27 September 2026 · Published 9 May 2026
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