Medicalchain is a decentralized platform that enables secure, fast and transparent exchange and usage of medical data. We introduce utilization of blockchain technology to store patient health records and maintain a single version of the patient’s true data. Medicalchain will enable different healthcare agents such as doctors, hospitals, laboratories, pharmacists and insurers to request permission to access and interact with medical records. Each interaction is auditable, transparent, and secure, and will be recorded as a transaction on Medicalchain’s distributed ledger. Moreover, no privacy is lost in this process; Medicalchain is built on the permission based Hyperledger Fabric architecture which allows varying access levels; patients control who can view their records, how much they see and for what length of time. Medicalchain is dedicated to empowering patients, improving outcomes, and building healthcare infrastructure for the future.