Cloud-based storage of electronic health data always poses a security risk. Medical malpractices (e.g., misdiagnosis and delayed diagnosis) can be hidden if intruders remove or modify a patient’s electronic health record (HER). It requires a new design framework to address the security problems. Data storage can be secured using the blockchain, a novel technology replacing the present HER system with a reduced installation cost. This paper presents a novel framework using a blockchain-based electronic medical record management cloud system that have ensured the high security network. To integrate a wrapper layer for correct authentication on the blockchain server database. To simulate the Ethereum network and interface with the Ethereum platform to build a prototype to test the concept’s practicality. We use HTML5 and JavaScript to create client-side applications.