No reliable figure exists for this, and any blog quoting a specific percentage is likely making it up. What research does show is the mechanism: customers rarely complain before leaving — they simply switch brands after one or two poor experiences, which makes the churn silent and hard to measure.

A meta-analysis found patients receiving reminders were 23% more likely to attend and 25% less likely to no-show. Sending two or more reminders boosted attendance by another 19% over a single reminder, so multi-touch campaigns clearly outperform one-off calls.

Indifference makes churn silent. In healthcare settings, patients who couldn't reach a clinic on the first try often wouldn't call back, leaving staff unaware they'd left — and retail customers behave the same way, switching brands after just one or two poor experiences rather than voicing frustration.

Simple forgetfulness — a 2004 study found 32.9% of no-shows happened because the patient forgot. That makes reminders the highest-leverage fix available, since the largest driver of disengagement is also the easiest one to address.

Yes — acquiring a new customer costs 5–7x more than retaining an existing one. Proactive outreach is far cheaper than replacing the customers who quietly drift away. My AI Call Center runs reminder and retention campaigns from 9¢ per connected minute, with the full cost quoted before launch.

Research suggests the opposite — as one source puts it, aggressive enforcement drives patients away. Engagement beats penalties: with missed appointments costing US healthcare over $150 billion annually and physicians losing roughly $200 per unused slot, reminder campaigns recover that revenue without alienating anyone.