Which model of Health Information Exchange stores data locally on a server?

The federated model of Health Information Exchange (HIE) allows for the storage of data locally on individual servers, maintained by various healthcare organizations rather than in a single, central repository. This model operates under the principle that each participating entity retains control over its own data. By doing so, it fosters collaboration among different organizations while ensuring that sensitive patient information remains on-site, adhering to privacy regulations and allowing for local decision-making regarding access and use of data.

In a federated system, when a healthcare provider needs information about a patient from another organization, they can query that entity's server. The system retrieves the necessary data without moving it from its original location, thus preserving the autonomy of each organization involved. This setup can be particularly advantageous in scenarios where interoperability and data sharing need to balance with the security and privacy of sensitive health information.

The other models mentioned, such as centralized, hybrid, and decentralized, involve different approaches to data storage and exchange. The centralized model relies on a single, overarching database where all data is stored, which is not what the question describes. The hybrid approach combines elements from both centralized and decentralized systems, while the decentralized model implies that data is stored across multiple independent locations, but not necessarily localized to individual servers. These distinctions