Partenamut

I can't imagine that any mutuelle would reimburse a non-prescribed, non-medical treatment in another country.

However, to be sure the only way to find out is to contact Partenamut themselves.

You have already been told what to do. Go to Partenamut and ask them - simples!

Why are you asking here? You need to ask Partenamut or look at the Partenemut website which is a far better reference than here.

If you ask Partenamut insurance, there's every chance that they'll tell you that you'll get a better answer of the internet.