Which of the following represents a technological mechanism for secure health information sharing?

The Nationwide Health Information Network (NHIN) represents a technological mechanism specifically designed to facilitate secure sharing of health information across various entities, such as healthcare providers, patients, and payers. The NHIN provides the infrastructure and standards necessary to ensure that health information can be shared securely and efficiently while maintaining patient privacy and data integrity.

The NHIN enables interoperability between different electronic health systems, allowing for seamless communication and exchange of health data, which is crucial for coordinated patient care. This framework is built with security protocols to protect sensitive health information from unauthorized access and breaches, thus emphasizing its role in secure health information sharing.

In contrast, while Electronic Health Records (EHR) and networked personal health records are essential tools in healthcare for maintaining patient information, they do not, on their own, provide the same level of standardized, nationwide secure interoperability that the NHIN offers. A Managed Care System, while it may involve health information sharing, is more concerned with the organization and delivery of healthcare services rather than the secure exchange of health information data on a national level.