Health Minister David Anderson says one member of staff has left in the last year over inappropriate access to computer systems.
He revealed the information in response to a question for written answer from Speaker of the House of Keys Steve Rodan in Tynwald this week.
Mr Anderson said there was only one such incident over the past twelve months.
He said an investigation was launched but the person involved resigned, and there was no inappropriate information disclosure.
Crime on the Island continues to fall while serious incidents create 'exceptional demand'
Chief Constable Russ Foster's Annual Report published
As heatwave heads our way, how do we stay safe in the sun?
Island could reach 27 Celsius on Thursday
Castletown Commissioners celebrating 130 years of Poulsom Park
Event has been organised to commemorate anniversary
Cost of a passport set to increase this summer
Treasury says higher fees will mirror fees introduced in the UK earlier this year