The digitization of healthcare has brought about transformative changes, with Electronic Health Records (EHR) leading the charge in advancing patient care. However, the secure management of sensitive EHR data remains a significant challenge. This review critically examines Blockchain technology as a robust solution for preserving patient privacy through secure data-blocking mechanisms. By assessing the current state of EHR security and Blockchain's potential in mitigating privacy risks, this paper offers valuable insights into existing research and practical implementations. Through a systematic analysis, it provides a nuanced understanding of the relationship between Blockchain technology and EHR, laying the groundwork for discussions on fortifying privacy in electronic health data management. Tailored for researchers, practitioners, and policymakers, this comprehensive review serves as a vital resource for navigating the evolving intersection of Blockchain and healthcare information systems within the IEEE research community.