NHS clinics cut missed appointments by texting patients the cost

Missed outpatient appointments — 'did not attends' or DNAs — were costing the NHS hundreds of millions of pounds a year: a clinician, a room and a slot held open for a patient who simply never turns up, with no way to fill it on short notice and a knock-on delay for everyone behind them in the queue. NHS England's own analysis put the reachable saving at over a quarter of a billion pounds a year if DNA rates could be pushed down toward 2%.

The standard fix was a generic reminder — 'you have an appointment on [date]' — which assumed patients forgot. But forgetting is only part of the story: many DNAs are patients who deprioritize an appointment they don't feel urgently attached to against everything else competing for their day. A 2013–2014 trial by Barts Health NHS Trust and researchers including Michael Hallsworth and Ivo Vlaev tested whether the content of the reminder, not just its existence, could close that gap.

Texted patients the cost of a missed appointment, making the financial waste personal and immediate, which cut no-shows.

The cost made the appointment feel more valuable and the no-show more costly.

Patients deprioritize appointments they don't feel attached to; the cost created a sense of obligation.

The specific number was more salient than a generic reminder, prompting action.

The intervention cost nothing extra, so the savings were pure gain.

To reduce no-shows, make the true cost of not showing up concrete and specific in the reminder, rather than just sending more reminders or threats.

Trials repeatedly show reminder systems cutting missed appointments by roughly a quarter. In the Barts Health trials specifically, a text that stated the appointment's approximate cost to the NHS (about £161) cut the DNA rate to 8.2–8.4%, against 9.9–11.1% for the existing reminder or a generically worded version — a difference projected to prevent about 5,800 missed appointments a year at that one trust, at no added cost.