Introduction to HL7 Version 3 V3 Methodology Tutorial 4/10/2017 HL7 ANSI ACCREDITED STANDARDS ORGANIZATION HL7 Tutorial Introduction to HL7 Version 3 W. Ted Klein Senior Scientist, McKesson HBOC HL7 Modeling and Methodology Technical Committee Co-Chair 1/25/99 © 1998,1999 Health Level 7 © 1999, Health Level 7

What Is HL7? The HL7 organization was founded in 1987 In June 1994 HL7 was designated as an ANSI accredited standards development organization (SDO) 1/25/99 © 1998,1999 Health Level 7

V3 Methodology Tutorial 4/10/2017 HL7 Mission Statement To provide standards for the exchange, management and integration of data that supports clinical patient care and the management, delivery and evaluation of healthcare services. ... the complete ‘life cycle’ of a standards specification -- development, adoption, market recognition, utilization and adherence. 1/25/99 © 1998,1999 Health Level 7 © 1999, Health Level 7

Standard Development Participants M&M Methodology, Measurement, Coordination Executive Committee Business Strategy & Motivation Why? How? V3.0 When? What? Technical Steering Committee Planning & Enforcement Technical Committees Modeling & Voting 1/25/99 © 1998,1999 Health Level 7

HL7 Standard Versions 2.0 (1988) Prototype 2.1 (1990) First standard 2.2 (1994) In operation 2.3 (1997) Current ANSI standard 2.3.1 (1998) Currently in ballot 3.0 (1999) Substantial change in process (introduction of formal methods) 1/25/99 © 1998,1999 Health Level 7

What does “HL7” stand for? V3 Methodology Tutorial 4/10/2017 What does “HL7” stand for? A domain-specific, common protocol for the exchange of health care information. HL7 Function 7 Application 6 Presentation 5 Session 4 Transport Communication 3 Network 2 Data Link 1 Physical ISO-OSI Communication Architecture Model 1/25/99 © 1998,1999 Health Level 7 © 1999, Health Level 7

Yesterday, change was a by-product of business. Business Problem Yesterday, change was a by-product of business. Today, business is a buy-product of change. 1/25/99 © 1998,1999 Health Level 7

V3 Methodology Tutorial 4/10/2017 Business Realities Accelerating pace of business change - rapid shifting of requirements demands increased IS responsiveness Increasing IS complexity - constant evolution of new technologies (e.g., client/server, Internet, multimedia) Increasing competition - demands to reduce time-to-market while decreasing costs and improving quality 1/25/99 © 1998,1999 Health Level 7 © 1999, Health Level 7 5 5

Accelerating Pace of Business Change Migration Towards a Wellness Model Managing Visit Managing Care Managing Health Market Reform Socialized Medicine Present time Clinton’s Reform Initial Fee-for-service, on-demand Anticipated Preventive, episodal Transitional Capitated, case-based 1/25/99 © 1998,1999 Health Level 7

Increased IS Complexity Client/Server, Internet, Multimedia Centralized Computing (Batch) Network Computing (RPC) IBM Digital Dell Micron HP Community Computing (Internet) Enterprise Computing (Client/Server) 1/25/99 © 1998,1999 Health Level 7

Chapter-Specific Specs Trigger Event and Messages An HL7 Version 2.X Spec Chapter-Specific Specs Chapters 3, 4, 6, ... Chapters 2 and 8 Common Specs Trigger Event and Messages Segments and Fields 1/25/99 © 1998,1999 Health Level 7