I don't currently know. The socialized medicine is not the problem. We once had a system, that the full records where hidden from the health funds. But I think, recently this principle was weakened -- but not because of "socialized medicine" but just because of the infamous "electronic health card" -- governments like to play with new technical gadgets (that bring more costs and bureaucracy and no gain).
Being in Germany, you are already in fully socialized medicine, so any battle for privacy of health records is already lost.