_Blockchain and Digital Twins for Smart Healthcare_ describes the role of blockchain and digital twins in smart healthcare, covering the ecosystem of the Internet of Medical Things, how data can be gathered using a sensor network, which is securely stored, updated, and managed with blockchain for efficient and private medical data exchange. Medical data is collected real-time from devices and systems in smart hospitals: the internet of medical things. This data is integrated to provide insight from the analytics or machine learning software using digital twins. Security and transparency are brought through a combination of digital twin and blockchain technologies. * Provides the fundamentals of blockchain, digital twins, and IoMT * Presents a useful guide for readers on the new applications of blockchain, the medical digital twin, and IoMT * Explores how blockchain and digital twins can be used in the IoMT, smart hospitals, and for future healthcare services