However, according to reports from French publication La Parisien, the 50-year-old is now receiving stem cell transfusion treatment at the Georges-Pompidou hospital in Paris from Menasche, described in medical circles as a "pioneer in stem cell surgery".
"The treatment will begin on Tuesday morning and (he will) leave the establishment on Wednesday", stated Le Parisien, which claims the previous Ferrari star has already been handled there twice this spring.
Citing medical privacy rules, the Paris hospitals authority declined to comment about his treatment.
Last year, Schumacher's manager, Sabine Kehm said that the family appreciate the "empathy" coming from fans but added that they want to keep details about his health private.
Little has been seen or revealed about the seven-time Formula One champion's condition since his skiing accident in the French Alps nearly six years ago.
The father is living alongside close family members in the main body of a £50m ($62,996,100) mansion on the banks of Lake Geneva.
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He is often described as the greatest Formula 1 driver in history, holding several records in the sport including the most world championships, most wins, most fastest laps and the most races won in a single season.
"From what I understand, Michael's family have been able to give him the best treatment that money can buy in a specially constructed facility at the family home in Switzerland where he is looked after by a dedicated team around the clock", Fry continued.
The paper said about 10 security agents, some equipped with earphones, watched over the patient. Thick forest surrounding his castle-like home with high surrounding walls provides sanctuary from fan and media intrusion.
It has been suggested by old friends he is unable to walk or properly communicate. He fell, hitting the right side of his head on a rock, with such force his helmet split open. Doctors worked frantically to remove blood clots from his brain, but some were left because they were too deeply embedded.
Michael Schumacher spent three seasons with Mercedes at the end of his career (Martin Rickett/PA).