Almost every practice sits on a list nobody opens: the patients who have not been back for a year or two. They did not leave in anger. Life moved them elsewhere and nobody ever got in touch again. Reaching those people costs a fraction of what it costs to find a new patient — but in healthcare a badly written message is not merely ineffective, it is a liability. What follows is the process, with the legal constraints first rather than last.
What counts as an inactive patient
Before writing to anyone you need a definition you can apply to a database, because "I haven't seen them in a while" is not a criterion. The threshold depends on the kind of care:
- for a dental hygiene appointment or a routine check, absence already means something after eight to twelve months;
- for specialist consultations with an annual recall, fourteen to eighteen months is the reasonable line;
- for one-off procedures, past twenty-four months the relationship has probably dissolved on its own.
Write the definition down and run it against the practice's real records. The first result is usually a surprise: several hundred people who chose the practice at least once and have not heard from it since.
Why patients stop coming back
The tempting reading is dissatisfaction. The real reasons are far more ordinary — a periodic recall that slipped, a house move, a difficult few months, or the quiet assumption that "they'll call me if it matters". A share of every inactive list is waiting, without knowing it, for exactly the message the practice never sends.
That reading changes the tone of the contact. Nobody needs convincing. The job is to remind people, politely, that the practice is still here, and to make replying easy. It is the same principle behind the channels a practice already uses to talk to patients, applied over a much longer gap.
The rules come before the copy
This is where healthcare parts company with every other sector, and none of it is optional.
- You need a valid marketing consent. Contacting a former patient to invite them to book is promotional communication, not care. Under the GDPR that means a specific, documented, freely given and revocable consent for this kind of message — separate from the lawful basis you rely on to deliver treatment. We covered the mechanics of that separation in the article on GDPR and the healthcare CRM.
- No discounts, offers or promotions. Several European jurisdictions restrict advertising by health professionals to information that helps a patient make an informed choice, and prohibit the attention-grabbing or persuasive elements a commercial offer relies on. Italy is one of the strictest, but the principle is widespread and the professional bodies enforce it. A recall message with a price cut on it is not a clever growth tactic; depending on where the practice operates it is a breach of advertising rules, a professional-conduct matter, or both. Check what applies in your own jurisdiction before assuming otherwise.
- Generic messages, never clinical detail. No diagnosis, treatment or reference to the procedure the patient received travels over SMS, WhatsApp or email. A message that names a condition on a channel the practice does not control discloses health data. The correct message mentions the possibility of a check-up, never the clinical reason one might be needed.
- Every message must let someone stop it. Offer an opt-out, honour it immediately, and never make a second attempt on somebody who declined.
Inside those limits, reactivation is entirely legitimate. Outside them, it is the fastest way to turn a good idea into a complaint.
The process, step by step
1. Segment the list
Not all inactive patients are the same. A minimum segmentation splits the list by length of absence (twelve, eighteen, twenty-four months and beyond), by type of care, and by consent status. Anyone without a valid marketing consent leaves the campaign — that part of the list can only be recovered at the next visit, by asking for consent properly.
2. Pick the channel
SMS reaches everybody and gets read. WhatsApp works where the practice already uses it for conversations. Email carries a slightly longer message. The sensible default is the channel the patient has already used with the practice, rather than the one the practice finds most convenient.
3. Write the message
An effective message is short, personal in the name and generic in the content. A pattern that respects the constraints above:
Dear [name], it has been a while since your last visit to the practice. If you would like to book a check-up or need any information, you can reply to this message or call us on [number]. If you would rather not receive these reminders, reply STOP.
No manufactured urgency, no "last remaining slots", no clinical references. The restraint in the tone is part of the practice's reputation, not a stylistic preference.
4. Be ready for the replies
A reactivation campaign produces answers within hours: booking requests, questions, and a few people asking not to be contacted again. If the front desk is not ready for them, the effort is wasted — and unanswered replies do more damage than no message at all, which is the same arithmetic behind the cost of a missed call. Before anything goes out, decide who answers, in which hours messages are sent, and how opt-out requests are processed: immediately, and recorded.
Automating it without losing control
Done by hand once, reactivation works. The real value appears when it becomes a continuous process, where every patient receives the right reminder as they cross their own threshold, without anyone having to remember. A CRM configured for the practice runs the sequence: it identifies who passes the threshold, checks the consent, sends the message, and stops on a reply or an opt-out.
Automation does not transfer responsibility anywhere. The texts stay approved by the practice owner, the lists get reviewed before each send, and the legal limits apply exactly as they would to a message typed by hand. That is the perimeter of our patient recall service, where valid consent and generic messages are non-negotiable conditions rather than features.
When to send, and how often
Timing is a form of respect. Sensible windows are the ones in which the practice can actually answer: mid-morning or early afternoon on weekdays, never in the evening, never at the weekend, never up against a public holiday. A message that lands at nine on a Saturday night announces neglected automation — the opposite of what a practice wants to say about itself.
On rhythm, the best campaign is the one that stops being a campaign. After the first pass over the backlog, the process turns continuous and runs in small batches, a few dozen messages a week. Small batches keep replies inside what the front desk can absorb, and they let the practice correct the wording as it goes — reacting to real responses instead of discovering a problem after five hundred sends.
Measuring honestly
The useful metrics are few: how many people received the message, how many replied, how many booked, and how many asked not to be contacted again. Double-digit reply rates are possible on a well-maintained list, but nobody can promise a result — it depends on the quality of the records, the strength of the prior relationship and the kind of care involved. Be sceptical of anyone who guarantees numbers before seeing your database. We do not do it either.
Common questions
Can I write to every former patient in the practice?
No. Only to those with a valid, documented marketing consent. For everyone else, the consent gets collected at the next opportunity, in person, with an explanation of what it is for.
Can I offer a discount to bring patients back?
Treat it as off-limits until you have checked your own jurisdiction, and expect the answer to be no. Advertising rules for health professionals in much of Europe — Italy among the strictest — exclude promotional incentives aimed at patients. A compliant recall informs and reminds; it does not pay people to come back.
How often can I contact an inactive patient?
Sparingly. One message, at most one reminder weeks later, and then the silence is the answer. Repeated pressure erodes trust and drives opt-out requests up.
Where do I start if the database is a mess?
With the clean-up. Duplicate records, untracked consents and dead phone numbers all get fixed before anything is sent. If you want to understand what is actually in your database and what it is worth, get in touch, or start from the free guide to medical marketing, where the topic has a chapter of its own.