1. Introduction

Blockchain technology has recently gained popularity in many fields, including the healthcare industry.Blockchain technology provides a secure, and distributed database that does not require the intervention of an administrator or central authority. Additionally, blockchain technology has generated interest as a means of enhancing the transparency and authenticity of healthcare data [1].Patients are considered the primary entities and centers of a blockchain-based healthcare ecosystem. It can make significant improvements in terms of security, reliability, and interoperability of health data. This means that blockchain technology offers the potential to transform the healthcare industry. Thus, blockchain suggests a convenient, reliable, and protected model for the conversation of electronic health records (EHRs) and electronic medical records (EMRs) between patients and their healthcare providers. Most of the current limitations of the healthcare system are resolved by allowing them to centralize and improve their effectiveness and safety by using blockchain.The fundamentals of blockchain have been described here along with current and future blockchain applications in the healthcare industry [2].