# Blockchain Technology in Healthcare: A Comprehensive Review and Directions for Future Research
### Blockchain Use Cases in Healthcare Data Management  
**Health Education:** The primary use of the blockchain is as a mechanism for recording transaction of the Bitcoin digital currency, but this mechanism could be used in an education field too [92; 93]. The base of education is the exchange of knowledge as well as skills from multiple sources. It assumes the trustworthiness of all the parties involved. With the proliferation of online learning, it becomes challenging for regulatory agencies to control the alteration of knowledge in medical education [94; 95]. According to [PERSON] et al. [94], the health professions educators' blockchain technology could potentially improve the quality of education and educational impact on multiple generations of learners. It can also help build a relative value of educational interventions. Additionally, any institution adopting blockchain technology would be able to provide certification on their own without any third party in between. Blockchain could also affect medical library management in many ways, including gathering, preserving, sharing authoritative information by creating timestamped, verifiable versions of journal articles [96]. By using blockchain in healthcare, we can ensure that the knowledge is secured and is not altered at all. For example, storing educational information in records with blockchain technology will easily allow health educators to track their impact as their students ultimately become educators themselves, and eventually pass along their knowledge to each subsequent class of students. It will also allow for easy tracking of the most utilized and most effective learning modules. Additionally, without any help from the third-party, certification could be provided to the right people. These ideas represent the potential benefit that blockchain technology could bring to health education.  
**Enrollment Data Management:** Enrolling members into health care plans, healthcare delivery, criteria, credentialing records result in enrollment administrative data. Although the primary producer of this data is a government agency, the federal government and state governments, we can use data that generates from small, medium and even large healthcare providers [97]. The legacy of managing such a diverse dimension of data is manual, which requires an extensive process of checking references, credentials, and eligibility. Consequently, to some extent, the whole process is prolonged. This overwhelming task for administrative assistance slows down the entire enrollment process and constitutes a barrier for an efficient healthcare system. However, this information could be stored into a blockchain to check reliable references and relevant records with the shortest possible time. In pursuit of increased enrollment process efficiency, this could benefit an administrative assistant through procedural simplification, eligibility inquiries, network management, and coordination.  
**Security:** The blockchain technology has reached a great boom in the health sector, due to its importance to overcome security challenges of the EHR in Healthcare [98]. EHRs have the potential to improve the delivery of healthcare [99]. It is created when a patient is admitted to a hospital, and when a physician diagnoses a patient, or when a diagnostic result such as an MRI scan is stored in the EHR system [100]. Therefore, security of such digital information is given utmost priority, and currently using blockchain for a safe and secure healthcare data [53]. Keeping the value of data, and reducing storage cost for data management in healthcare blockchain technology plays a significant role. Due to its unique capability, blockchain technology is the only answer for securing digital information, and it continues to play a crucial role in the future of enterprise data management.