Basically, the Member State of affiliation shall reimburse the cost of the cross-border healthcare of up to the maximum amounts that would have been accepted, if the healthcare service in question had been provided within its territory. At this, the amount of reimbursement may not exceed the actual costs incurred.
For benefits in kind which are subject to prior authorization, a "special" reimbursement will apply. For all other benefits in kind, 80 percent of the nationally valid contract tariffs will be reimbursed (applies both to benefits provided by the foreign contractual partner and to foreign noncontractual partners).
You can find out the amount of the expected coverage of costs from your social insurance fund.
If a prior authorization has not been issued or not been requested, there is no claim for reimbursement of costs afterwards. Nevertheless, the insured person is advised to contact the responsible health insurance fund and have this checked in each individual case.