The convergence of emerging technologies is reshaping industries at an unprecedented pace, and healthcare is no exception. With the rapid digitization of medical records, the proliferation of connected health devices, and the growing need for secure and efficient data management, the healthcare sector faces both immense opportunities and daunting challenges. Among the most promising solutions to these challenges are blockchain technology and federated learning—two revolutionary paradigms that offer a decentralized, privacy-preserving approach to healthcare innovation. Decentralized Healing: Transforming Healthcare with Federated Learning and Blockchain Technologies aims to serve as a comprehensive guide to understanding and implementing these transformative technologies in the healthcare ecosystem. The chapters in this book cover a diverse range of topics, from fundamental concepts and theoretical frameworks to real-world applications and case studies. Readers will gain insights into how federated learning enables collaborative artificial intelligence (AI) training while preserving patient data privacy, how blockchain ensures data integrity, security, and traceability, and how the integration of these technologies can drive innovations in electronic health records, cybersecurity, and decentralized healthcare networks. A major highlight of this book is its focus on practical applications and future trends. Whether you are a healthcare professional, blockchain/AI researcher, policymaker, or industry leader, it offers valuable knowledge and actionable insights into how decentralized approaches can empower patients, improve medical decision-making, and revolutionize global healthcare infrastructures. This book serves as a valuable resource for anyone passionate about the future of healthcare and technology. By embracing decentralized and privacy-preserving solutions, we can pave the way for a more secure, efficient, and patient-centric healthcare system. Let the journey towards decentralized healing begin!