Doctors say a $11.7 million budget cut will cause "catastrophic damage to already overstretched services".
The AMA, public sector and firefighters' unions united in condemnation of departmental budget cuts announced by Treasurer Peter Gutwein on Wednesday.
AMA Tasmania vice-president Dr John Davis said frontline staff and services would be affected.
"The size of a cut is irrelevant because the fact is to impose a cut of any magnitude on any of our hospitals at this crucial time is reckless and damaging to patients' services and staff morale," Dr Davis said.
"There is simply no room for any cuts to health funding without causing catastrophic damage to already overstretched services.
"How can you take money out of a system when there are still ambulances ramping at our major hospitals, people staying too long in the emergency departments due to lack of in-patient beds and patients are being left languishing on the elective surgery waiting list?
"It makes a mockery of the government's investment in more doctors and nurses when they give with one hand and take with the other."
Dr Davis said the cuts would have a "dramatic effect on staff morale".
"The reality is that any cuts to hospitals' budgets whether they are administration or frontline care staff will see patients not receiving the care they need when they need it and elective surgery patients having to wait longer for their operations, putting lives at risk," he said.
"The government should be looking towards the future in matching mainland salaries and training opportunities and providing competitive openings for career growth to attract and retain the best people for the jobs regardless of their role within the system. Asking already overworked and demoralised staff to do more with less will have dire consequences."
United Firefighters Union spokesman Dennis Mullins said the Tasmania Fire Service was operating on staffing numbers from 1997.
"They are working on 1997 staffing levels in 2019 when we have a great population and a greater fire risk due to climate change," Mr Mullins said.
Community and Public Sector Union general secretary Tom Lynch said Mr Gutwein was "deliberately misleading Tasmanians" when he says cuts will not impact services some of which he said were already in crisis.
"His pretence that there is a frontline that he is protecting and a backline that can be cut without consequence is a fallacy," Mr Lynch said.
"Vulnerable children are falling through an under resourced child safety system, our biosecurity barrier is porous and failing regularly, our firefighters are overworked and under resourced, there are too few workplace inspectors to ensure safe workplaces and family violence counsellors can't support women trying to leave violent partners.
"Peter Gutwein want us to believe he can make cuts to all these services and things will get better, not worse.
"Vacancy control is a blunt tool that means service areas with the highest turnover - child safety officers, correctional officers, nurses - won't be able to fill vacant positions, further reducing their capacity to provide Tasmanians with the services they need."