Cairo (CNN) -- Former Egyptian President Hosni Mubarak was transferred to a military hospital after doctors found fractures in his ribs from a recent fall, his lawyer said.
Mubarak is serving a life sentence in a Cairo prison for his role in the deaths of protesters during last year's uprising.
The 84-year-old suffered a head injury and a bruised chest when he slipped in a prison hospital bathroom this month.
Last week, he was taken to a military hospital for X-rays on his head and ribs, and returned to Tora prison the same night, according to his lawyer, Farid El Deeb.
Doctors determined his condition requires more attention and better medical equipment not available at the prison, his lawyer said Thursday.
The lawyer is demanding that Mubarak remain at the military hospital permanently so he can get access to proper care.
"I have warned many times that the prison hospital conditions are not suitable," he said.
This is the latest in a series of health problems for the ousted leader.
In 2011, he attended court on a gurney at his trial for corruption and the killing of the protesters. He was reported to be in a coma last June in the weeks after he was convicted.
A spokesman for the prosecutor general said the former president will remain at the military hospital until his health improves.
"His lawyer presented an appeal for his release on December 23 in a court hearing," Adel el-Saeed said. "The court will issue its final verdict on January 13."
Mubarak's three-decade rule ended in February 2011.
Journalist Mohamed Fadel Fahmy contributed to this report