Great news! Since March this year, Partena (one of the Belgium mutual insurances) has introduced a new insurance Medicalia. (info only available in flemish or french.)
This insurance increases the standard cover for their clients, for both paramedical as well as medical costs, starting where the normal mutual insurance stops, increasing repayment up to 75%.
This extra insurance includes speech therapy, osteopathy, psychotherapy, homeopathy, and acupuncture.
Look at the partena website for more information.