Union leaders are meeting health managers in Lincolnshire to try to get more information about job cuts.
The United Lincolnshire Hospitals NHS Trust warned last month it will need to make significant cuts to address a predicted overspend of £2m a month.
Unison officials were told they are unlikely to get full details of the number of job cuts on Thursday.
They fear the move could mean the end of emergency and acute services at Grantham and Louth.
Peter Savage, from Unison, said: "In reality we're not just talking about administrative jobs, we're talking about doctors, nurses, technicians, porters.
"The hospitals in Lincolnshire previously went down the line of trying to save money by getting rid of cleaners, and we saw what happened - infection rates went right up, it cost them more money in the end."
Health managers said they would release details of the latest progress of the turnaround team put in place to look at the overspend early next week.
But they stressed this would not include details of any job losses and it could take another month before final decisions are reached.