Clinical and pathological laboratories in the Netherlands are undergoing major changes. A growing number of them are applying for Dutch ‘Raad voor Accreditatie’ (RvA) accreditation in accordance with the ISO 15189 norm. Laboratories previously needed CCKL accreditation, but the mandatory transition from CCKL to the international ISO 15189 as guideline for laboratories is now well under way. ISO 15189 means laboratory customers, regulatory authorities and accreditation bodies can confirm the medical laboratories’ competence. The aim of the RvA is to replace all Dutch laboratory CCKL accreditations with ISO 15189 before January 1st 2018.