Accurate maintenance of medical records and bills is essential to ensure transparency and trust in healthcare and insurance claim processes. Conventional record-keeping systems are prone to manipulation, inefficiencies, and unauthorized data access, leading to fraudulent claims and disputes between hospitals, patients, and insurance companies. To overcome these limitations, this project presents a Blockchain-based Patient Data and Billing Management System, developed. In this system, the Hospital Reception registers patients and generates unique patient IDs, while the Medical Department adds and manages medical bills linked to each patient. These bills are securely stored on a blockchain, ensuring immutability and preventing tampering. The Insurance Department can access the patient’s bills directly from the blockchain and verify them against the claims submitted, thereby eliminating fraud and ensuring accuracy in the settlement process. By leveraging blockchain technology, the system enhances data security, improves trust among stakeholders, and streamlines the insurance verification workflow.

Keywords: Blockchain, Patient Data Management, ASP.NET, Hospital Reception, Medical Bills, Insurance Verification, Immutable Ledger, Healthcare Security, Fraud Prevention, Data Transparency.