A north Wales AM has criticised the decision to close a Denbighshire hospital in 2011.
Mark Isherwood claims he has been contacted by patients who say there is a demand for services at HM Stanley Hospital in St Asaph.
He said he has written to the chief executive of the Betsi Cadwaladr University Health Board.
Chris Ruane MP and Ann Jones AM put their concerns to the health board last month.
The health board has said the community hospital in St Asaph is "no longer fit for purpose" and will be vacated by March 2011.
Mr Isherwood said he had been contacted by patients and carers concerned about the proposals which involve transferring the eye, stroke and outpatient services elsewhere.
He said: "Patients and carers need clear and unambiguous answers to the questions they have raised."
Mr Isherwood is founder of the campaign group Community Hospitals Acting Nationally Together (CHANT).
He said the decision to close HM Stanley Hospital had been based on "an out of date consultation on grossly unpopular proposals several years ago".