Introduction and scope The introduction of the Unique Device Identification (UDI) system referred to in Article 27 of Regulation (EU) 2017/745 on medical devices (MDR) aims to ensure an adequate level of identification and traceability with respect to medical devices. Basic UDI-DIs, UDI-DIs and UDIPIs shall be assigned (in compliance with the rules of the designated issuing entities) by manufac..