In certain circumstances, you may have to pay an additional deductible or excess amount. For example, your health insurer may charge you a deductible amount in 2017 even though the related treatment took place in 2018. The Zorgwijzer website explains why you may end paying an additional deductible or excess amount in the case of ongoing treatment. However, the information on this website is only available in Dutch. Therefore, if you have any questions, please contact your health insurer for more information.