© 2018 IEEE.Imported devices must be registered into the Turkey Pharmaceuticals and Medical Devices National Data Bank (TİTUBB). During these registrations the correct identification of the devices is important in terms of tracking and taxation of the devices. Occasionally, the customs officers are uncertain whether the imported device is a medical device, an accessory, or a cosmetic device. In such cases, the expertise of medical device specialists is consulted. In this paper, it is discussed how the device definitions are defined, and a few device definitions are presented as examples.