HL7 Immunization User Group

The HL7 Immunization User Group supports immunization information system (IIS) and electronic health record (EHR) implementers globally as they work to create and maintain immunization interfaces.


The HL7 Immunization User Group's purpose is to support IIS and EHR implementers globally as they work to create and maintain immunization interfaces. The user group provides:

  • Education and training on how to implement and use the HL7 v 2.x immunization messages
  • A forum to share lessons learned during implementation and ask questions regarding HL7 immunization messaging


The HL7 Immunization User Group includes experts from state and city IIS, public health organizations, CDC, and IIS and EHR vendors/implementers.

Membership in this user group is free for HL7 voting members and AIRA members. AIRA members interested in joining the HL7 Immunization User Group should create a user ID at HL7.org and then use the button below to fill out a quick form. An AIRA staff member will contact you. We’d love to have you join us.

Join Us!


The HL7 Immunization User Group typically meets on the second Thursday of each month from 2 to 3 p.m. ET (11 a.m. to noon PT). Meetings are also listed on AIRA’s events calendar.

HL7 Immunization User Group Resources for the IIS Community

Key HL7 Implementation Guide Resources:

IIS receive and share data on patients using HL7, a nationally recognized standard for electronic data exchange between systems housing health care data. The HL7 standard defines a syntax (grammar) and describes a standard vocabulary for formulating messages that carry the health information. Useful HL7 resources include HL7 Version 2.5.1 Implementation Guide for Immunization Messaging, Release 1.5 (published October 2014) and the Addendum (published July 2015).

Additional Resources for User Group Members

To access additional resources for user group members:

  • Go to My Profile and log-in
  • Select the “My Features” tab and click “Committees” in the dropdown menu
  • Select “HL7 Immunization User Group”
  • Select the “Files” tab