In the foreground, we have important legal protection that includes a series of laws and regulations that define primarily the proper relationship between health workers and patients, define each health profession, which ensures and regulates the data protection itself in general but also the specific area of health data patient. On the basis of the Constitution of the Republic of Croatia, numerous laws have been passed, and it is important to mention the Law on the Protection of Patients' Rights, the Law on Health Care, the Nursing Act, the Law on Midwife, the Law on Health Care Activities, the Law on Medical Care, the Law on Physiotherapy. The obligation of keeping professional secrets is regulated by various codes, the Code of Ethics and Deontology, as the most important in the Republic of Croatia, and the Code of Dental Ethics and Deontology, the Code of Pharmacy Ethics and Deontology, the Code of Ethics and Deontology of Medical Biochemists. It is also important to mention internationally, the International Code of Medical Ethics and the Principles of Ethics for European Doctors. An important role is also Regulation (EU) 2016/679, which applies in all EU Member States. It clearly defines the way and the ability to process personal data, while at the same time raises the requirement for high security of personal data protection of individuals. Violation of the right to privacy through the institute of violation of professional secrecy is punishable by the Criminal Code of the Republic of Croatia and by all professional laws. Especially high penalties are prescribed for infringers under Regulation (EU) 2016/679. The right of an individual to privacy is his personal right to be respected and derived from the right to liberty. Patients who do not have confidence in doctors may be denied some information due to discomfort and fear of discovering personal medical information. Confidentiality has great value for the patient-patient relationship because it is based on the independence, trust and respect of others. The systematic and continuous implementation of lifelong learning with the latest trends in legal practice and science, and education in the field of health law provides basic knowledge and clarifies the legal framework for the treatment of health workers, which directly leads to the improvement of healthcare for both the individual and the whole community.