Patients can be taken directly to Roscommon Hospital following agreement by the facility's management and the National Ambulance Service.
The hospital's A&E was closed in 2011, and this decision has been made following the ongoing pressure on emergency departments.
Certain patients who meet strict criteria will be taken to the model two facility between 9am and 3pm.
Roscommon Independent Deputy Denis Naughten has been telling Midwest News this evening that this will benefit older people in particular.