HL7 (Health Level 7): An ANSI standard for healthcare specific data exchange between computer applications. The name comes from "Health Level 7", which refers to the top layer (Level 7) of the Open Systems Interconnection (OSI) layer protocol for the health environment. The HL7 standard is the most widely used messaging standard in the healthcare industry around the world.
Using the material in this section, you can browse through select portions of the HL7 standard to learn more about specific HL7 Messages, HL7 Segments and HL7 Fields. Use the filter control to locate particular information from within the HL7 standard, or use the navigation links on the left-hand side. For more information on the HL7 standard, please visit the Health Level Seven International website at www.hl7.org.