After the man's cover was blown, he was reportedly escorted off the premises with Schumacher’s manager, Sabine Kehm shocked that the incident occurred.
Kehm told German journalists about the intrusion after a press conference in Grenoble. "Apparently a journalist dressed as a priest had tried to gain access to Michael's room," Kehm told a reporter from Die Welt.
"I wouldn't have ever imagined something like this could happen."
Gerard Saillant, a leading Parisian brain surgeon and close friend of Schumacher's, has appealed to the assembled journalists not to further obstruct the clinical staff's work by cornering them for one-on-one interviews.
"In Corinna's name I would like to ask you not to pressurise us," he said, referring to Schumacher's wife.
"Neither us, nor the family. You can do your best to help Schumacher win this difficult battle by leaving the doctors in peace. We are not hiding anything."
The medical condition of the seven-time Formula One world champion is slightly better following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said.
"The situation is more under control than yesterday but we cannot say he is out of danger," Jean-Francois Payen, head anaesthetician told a news conference at the CHU hospital in the eastern French city of Grenoble.
"We have won some time but we must continue an hour-by-hour surveillance... It is premature to speculate on his condition," he said, adding that it could still be qualified as "critical" and that "the hours to come are crucial."