The former Formula One world champion was admitted earlier on Monday to a hospital in Paris for "secret treatment", Reuters reported, citing local media, APA rpeorts quoting sputniknews.
Michael Schumacher, 50, suffered a severe head injury while skiing in the French resort of Meribel in December 2013.
The driving champion underwent brain surgery at a clinic in Grenoble, France, and was then placed into a medically-induced coma. In June, the retired German racer woke up from his coma and was transferred from the clinic to a rehabilitation facility in Lausanne, Switzerland.
In September, Schumacher was released to continue further treatment at home as his condition improved.
Schumacher is widely referred to as one of the greatest racing drivers of all time.
He won a total of 91 races and had 155 podium finishes, more than any other Formula One driver. He retired from Formula One driving at the end of the 2012 season.