Data interoperability of electronic medical records in dentistry in the present time is essential for ease and accuracy of health services. However, it also has the potential to cause ethical and legal problems in Indonesia if it is carried out without regard to the country’s laws and regulations. This issue encourages the author to conduct a further research on the legality and the concept of data interoperability of electronic medical records in dentistry in Indonesia. Where to be able to analyze the subject matter well, the authors in conducting research adheres to the paradigm of post-Positivism Paradigm, using Normative-Juridical Research Method where the Research data consist of primary data sources from related Laws and secondary data sources from related literature and analyzed using qualitative descriptive analysis. The results of this study indicate that the data interoperability of electronic medical records in dentistry is legally valid if it meets the requirements contained in Law Number 11 of 2008 and the Regulation of the Minister of Health Number 269 of 2008. The requirement as mentioned are: patients give their consent, guaranteed data privacy security, and original documents of electronic medical records must be kept in the health facility where only medical resumes (medical data) can be exchanged.