The rates used by Ruysdael Clinics for treatment is the average rate charged in the Netherlands by hospitals and medical clinics for the respective treatment. These rates are published on opendisdata.nl.
Famed takes care of processing the invoice with your health insurance. Should a part of the bill not be reimbursed, Ruysdael Clinics will waive this. The exception here is obviously the excess deductible that you have agreed with your insurer.