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When you are in the Patient Recall screen you can include a query, for example, Pt's with mobile numbers.
Once you have put in the date range and a list of patients has been displayed. You can then left click and hold to select 100 patients at a time to send out the recall SMS message.
Here is a previous article that explains the steps required to set up a query to search for pt's with mobile numbers.
If you need any further assistance, please get back in touch.
To change the recall message whether its Letter, SMS or Email this can be done via Document Manager.
Here are two knowledge based articles I think may help you:
If you require any further assistance, please get back in touch.