9,586 were on waiting lists for various forms of treatment at Naas General Hospital last month.
That's a slight reduction on 9,709 people in September.
The number of people seeking GI Endoscopy at the Kildare hospital, some 1,177, is the second highest in the Dublin Midlands Hospital Group.
Naas General Hospital waiting list data for October:
GI Endoscopy: 1,177