Unions say Thursday's Budget will boost health funding, but not enough to cover current costs.
Health was the big winner last Budget, when a boost of 4.3% took spending close to $14 billion.
The Council of Trade Unions says the sector needs $500 million extra to stand still, but from previous experience is likely to come in about $60 million short.
It says that will mean that district health boards have to make more savings to fund any new initiatives.
The Nurses Organisation says it is concerned about the chance of increasing disparities in society, affecting the poor, unemployed and other groups.
Doctors say the Government has shown a commitment to improving services despite severe financial constraints.