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    X12 Members List

    Alphabetized listing of current X12 members organizations.

    Membership Benefits

    Join other member organizations in continuously adapting the expansive vocabulary and language used by millions of organizations while leveraging more than 40 years of cross-industry standards development knowledge.

    Membership Categories

    Membership categories and associated dues are based on the size and type of organization or individual, as well as the committee you intend to participate with.

    Membership Application

    To apply for an X12 membership, complete and submit an application form which will be reviewed and verified, then you will be notified of the next steps. Some important considerations for your application include the type and size of your organization, your named primary representative, and committee-subcommittee you intend to participate with.

    Renew Membership

    To renew an X12 membership, complete and submit an application form which will be reviewed and verified, then you will be notified of the next steps. Some important considerations for your application include the type and size of your organization, your named primary representative, and committee-subcommittee you intend to participate with.

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    Glass

    Online access to all available versions of X12 products, including The EDI Standard, Code Source Directory, Control Standards, EDI Standard Figures, Guidelines and Technical Reports.

    Licensing Program

    Multi-tier licensing categories are based on how licensees benefit from X12's work, replacing traditional one-size-fits-all approaches. Categories include Commercial, Internal, Developer and more.

    External Code Lists

    Claim Adjustment Group Codes
    Claim Adjustment Reason Codes
    Claim Status Category Codes
    Claim Status Codes
    Error Reason Codes
    Industry Specific Remark Codes
    Insurance Business Process Application Error Codes
    Insurance Descriptor Codes
    Payment Type Codes
    Property & Casualty Code Lists
    Provider Adjustment Reason Codes
    Provider Taxonomy Codes
    Remittance Advice Remark Codes
    Report Type Codes
    Service Review Decision Reason Codes
    Service Type Codes
    Service Type Descriptor Codes
    See All Code Lists

    Technical Reports

    X12 produces three types of documents to facilitate consistency across implementations of its work.

    • Type 2: Reference Model
    • Type 3: Implementation Guide
    • Type 4: Clarification Paper

    All X12 Transaction Sets

    X12 defines and maintains transaction sets that establish the data content exchanged for specific business purposes. Each transaction set is maintained by a subcommittee operating within X12’s Accredited Standards Committee.

    By Industry

    X12 standards are the workhorse of business to business exchanges proven by the billions of daily transactions within and across many industries including:

    • Finance
    • Health Care
    • Insurance
    • Supply Chain
    • Transportation
    • Aerospace

    Intellectual Property Use

    X12 has developed standards and associated products to facilitate the transmission of electronic business messages for over 40 years. X12 manages the exclusive copyright to all standards, publications, and products, and such works do not constitute joint works of authorship eligible for joint copyright.

    All X12 work products are copyrighted. Any use of any X12 work product must be compliant with US Copyright laws and X12 Intellectual Property policies.

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    About X12

    Chartered by the American National Standards Institute for more than 40 years, X12 develops and maintains EDI standards and XML schemas which drive business processes globally. X12's diverse membership includes technologists and business process experts in health care, insurance, transportation, finance, government, supply chain and other industries.

    Overview

    Corporate Mission and Principles

    neX12

    X12 standards are the workhorse of business to business exchanges proven by the billions of transactions based on X12 standards that are used daily in various industries including supply chain, transportation, government, finance, and health care. Millions of entities around the world have an established infrastructure that supports X12 transactions.

    Introducing neX12...

    X12 is well-positioned to continue to serve its members and the large install base by continuing to support the existing metadata, standards, and implementation tools while also focusing on several key collaborative initiatives.

    • Glass: X12's Online Viewer
    • Bridge: Standardized Syntax Neutral X12 Metadata
    • ARC: Annual Release Cycle

    Officers

    X12 is led by the X12 Board of Directors (Board). The X12 Board and the Accredited Standards Committee’s Steering group (Steering) collaborate to ensure the best interests of X12 are served. Each group has specific responsibilities and the groups cooperatively handle items or issues that span the responsibilities of both groups.

    Committees

    • Accredited Standards Committee (ASC)
      • Steering Committee
      • Procedures Review Board (PRB)
      • Policies and Procedures (P&P)
      • ASC Subcommittees
        • X12C – Communications and Controls
        • X12I – Transportation
        • X12J – Technical Assessment
        • X12M – Supply Chain
        • X12N – Insurance
    • Registered Standards Committee (RSC)
      • RSC Subcommittees
        • X12-03 – External Code List Oversight (ECO)
        • X12-04 – Business to Everything (B2X)

    Liaisons

    X12 appoints various types of liaisons, including external and internal liaisons. Internal liaisons coordinate between two X12 groups. External liaisons represent X12's interests to another organization as defined in a formal agreement between the two organizations. More information is available in X12 Liaisons (CAP17).

    Industry Groups and Caucuses

    X12 welcomes the assembling of members with common interests as industry groups and caucuses.

    Current and past groups and caucuses include:

    • Clearinghouse Caucus
    • Connectivity Caucus
    • Dental Caucus
    • Medicaid Caucus
    • Provider Caucus
    • Tricare Caucus
    • Innovation Taskforce

    Awards

    X12 is pleased to recognize individual members and industry representatives whose contributions and achievements have played a role in the development of cross-industry eCommerce standards.

    Edward A. Guilbert Lifetime Achievement Award

    Earl “Buddy” Bass Achievement Award

    Distinguished Service Award

    Terms, Policies, and Licenses

    X12’s website terms of use, privacy policy, and license agreements, which you have agreed to based on your use of X12 resources and content.

    View Terms, Policies and Licenses

  • News + Events
    • News
    • X12 Blog
    • Meetings
    • Important Dates
    • Release Schedule
    • X12 HIPAA Recommendations

    News

    June 3, 2026
    Announcing New X12 008060 Implementation Guide XSDs and Table Data
    May 21, 2026
    X12 Summer Officer Elections – 2026-2028 Term
    May 6, 2026
    Summer 2026 X12 Officer Elections
    May 6, 2026
    X12 Announces Summer 2026 Officer Elections
    April 27, 2026
    Announcing the X12 008060 278 Health Care Services Review – Request for Review and Response Webinar
    April 17, 2026
    Using AI with X12 Standards: What’s Allowed, What’s Not, and Why It Matters
    See All News

    X12 Blog

    April 17, 2026
    Using AI with X12 Standards: What’s Allowed, What’s Not, and Why It Matters
    February 22, 2024
    Funding Sources Vary Widely Among Standards Associations
    July 21, 2023
    One Size Does Not Fit All for Standards Funding Models
    November 28, 2022
    X12’s Annual Release Cycle Keeps Implementation Guides Up to Date
    November 17, 2022
    B2X Supports “Business to Everything” for X12 Stakeholders
    September 22, 2022
    Saddened by the loss of a long-time X12 contributor
    See All Blog Posts

    Meetings

    Upcoming meetings:

    Fall 2026 Standing
    Sunday, September 27, 2026 – Wednesday, October 7, 2026
    Meeting Details
    Winter 2027 Standing
    Sunday, February 21, 2027 – Wednesday, March 3, 2027
    Meeting Details
    See All Meetings

    Important Dates

    June 21 – 2026-06-08 X12N 14-day Subcommittee Electronic MR Ballot ends (if needed)
    June 29 – ASC Ballot: Maintenance Request Package begins
    July 3 – Deadline for submitting code maintenance requests for member review of Batch 139
    July 6 – 2026-07-06 X12N Subcommittee 14-day Comment Period begins (if needed)
    July 10 – Batch 139 member review begins
    July 13 – 2026-07-13 X12N 14-day Subcommittee Electronic MR Ballot begins (if needed)
    See All Important Dates

    Release Schedule

    The EDI Standard is published once per year in January.

    Proposed modifications to the current EDI Standard proceed through a series of ballots and must be approved by impacted subcommittees, the Technical Assessment Subcommittee (TAS), and the Accredited Standards Committee stakeholders in order to be included in the next publication.

    The tables on this page depict the key dates for various steps in a normal modification/publication cycle.

    X12 Recommendations to NCVHS

    X12 has submitted recommendations related to advancing the version of already adopted and mandated transactions.

  • Resources
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    Feedback

    X12 welcomes feedback. Submit the form with any questions, comments, or suggestions related to corporate activities or programs. This feedback is used to inform X12's decision-making processes, policies, and question and answer resources. This form is not used to request maintenance (revisions) to X12 products or to submit comments related to an internal or public review period.

    Policies and Procedures

    X12 maintains policies and procedures that govern its corporate, committee, and subordinate group activities and posts them online to ensure they are easily accessible to members and other materially-interested parties.

    Forms

    Frequently Used Forms

    Code Maintenance Request
    Request for Interpretation
    Maintenance Requests
    Member Representative Request for Workspace Access
    See All Forms

    Meeting Minutes

    Browse and download meeting minutes by committee.

    Requests for Interpretation

    Review X12's official interpretations based on submitted RFIs related to the meaning and use of X12 Standards, Guidelines, and Technical Reports, including Technical Report Type 3 (TR3) implementation guidelines. Submit a request for interpretation (RFI) related to the implementation and use of X12 work.

    Info Center

    Information about the X12 organization, its activities, committees & subcommittees, tools, products, and processes. Information is presented as a PowerPoint deck, informational paper, educational material, or checklist. Content is added to this page regularly.

    Information related to the X12 corporation is listed in the Corporate section below. Committee-level information is listed in each committee's separate section. Policies and procedures specific to a committee's subordinate groups, like subcommittees, task groups, action groups, and work groups, are also listed in the committee's section.

    X12 EDI Standard Examples

    270/271 — Health Care Eligibility Benefit Inquiry and Response
    276/277 — Health Care Claim Status Request and Response
    276/277 — Health Care Claim Status Request and Response
    277 — Health Care Information Status Notification
    277 — Data Reporting Acknowledgment
    278 — Health Care Services Review - Request for Review and Response
    278 — Health Care Services Review - Inquiry and Response
    278 — Health Care Services Review Notification and Acknowledgment
    278 — Health Care Services Review Notification and Acknowledgment
    278 — Request for Review and Response Examples
    278 — Health Care Services Review - Request for Review and Response
    278 — Health Care Services Review Notification and Acknowledgment
    See All Examples

    Transaction Flow

    X12 defines and maintains transaction sets that establish the data content exchanged for specific business purposes and, in some cases, implementation guides that describe the use of one or more transaction sets related to a single business purpose or use case. The diagrams on the following pages depict various exchanges between trading partners.

    Supply Chain Transaction Flow

    Health Care Transaction Flow

    Membership & Licensing Help

    For help on how to purchase, manage, or renew your X12 membership, license, or code list subscription, review these FAQs.

    Contact Us

    Contact us through email, mail, or over the phone. All of our contact information is here.

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Announcing New X12 008060 Implementation Guide XSDs and Table Data

Body

We wanted to notify you that we have produced new derivatives - XML Schema De

  • Read more about Announcing New X12 008060 Implementation Guide XSDs and Table Data

SparkCange

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RFI #2851: Clarification on Segment N101 in Loop 2750 of 005010X220 (834)

  • Read more about RFI #2851: Clarification on Segment N101 in Loop 2750 of 005010X220 (834)

Inovalon

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X12 Summer Officer Elections – 2026-2028 Term

Body

X12 recently issued a call for appl

  • Read more about X12 Summer Officer Elections – 2026-2028 Term

Avizva

  • Read more about Avizva
  • Read more about Example: Inpatient Hospital Stay
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  • Read more about Example: Chiropractic Spinal Manipulation with X-Ray
  • Read more about Example: Anesthesia for Laser Eye Surgery

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