The HL7 Pocket Guide

The HL7 Pocket Guide: Hospital Systems Integration Map

Healthcare today depends on the seamless exchange of data across multiple clinical and administrative systems. Every patient admission, lab result, radiology report, and billing transaction requires accurate communication between healthcare technologies. Behind this digital communication is one of the most widely used healthcare interoperability standards in the world: HL7 (Health Level Seven).

The HL7 Pocket Guide provides a clear and practical overview of how hospital systems communicate using HL7 messaging. Designed as a quick-reference resource, this guide simplifies complex integration concepts and visually maps how core healthcare systems interact through an HL7 interface engine.

Inside this guide, you will explore how key hospital technologies connect, including:

• Electronic Health Records (EHR)
• Laboratory Information Systems (LIS)
• Radiology Information Systems (RIS)
• Billing and financial systems
• Data warehouses and analytics platforms
• Emerging applications such as healthcare AI and research systems