Ethereum is suitable for medical data storage via dedicated modules due to its robust smart contract functionality, enabling secure, transparent, and decentralized data management. Its immutability ensures data integrity, while smart contracts facilitate fine-grained access control and automated data sharing, critical for patient privacy and interoperability. Off-chain solutions like IPFS address Ethereum’s scalability limitations, storing large medical records efficiently while keeping hashes on-chain for verification. However, high transaction costs and latency on public Ethereum networks may pose challenges, potentially mitigated by private or consortium setups. Estonia’s blockchain-based medical record system exemplifies Ethereum’s potential. With proper module design, Ethereum can meet security, privacy, and interoperability needs for healthcare.