Until now, the processing of personal data in medical practice has been mostly in a closed context, meaning it was clear how the data flowed. The arrival of new technologies, such as eHealth and mobile health, have impacted the way personal data is collected in medical practice. A first review of the General Data Protection Regulation (GDPR) shows that it is mostly drafted for processing health data in a closed medical context. Therefore, this paper analyses where the shortcomings of the GDPR exist in meeting the new, more open context of data processing in medical practice. It is important that this research is being done, since the shortcomings possibly affect the core element, e.g. trust of patients, in the health care system. Furthermor...