I want to . . .
- Search for an active workers’ comp case
- Know my rights
- Know what to do when I get hurt on the job
- Find a fact sheet or I&A guide
- Find a form
- Find a publication
- Find a report
- Find a DWC office
- Contact DWC
- Participate in DWC rulemaking
- Participate in a DWC forum
- Participate in a WCAB forum
- Participate in DWC's 17th annual educational conference
California's workers' compensation information system (WCIS) uses electronic data interchange (EDI) to collect comprehensive information from claims administrators to help the Department of Industrial Relations oversee the state's workers' compensation system. This information helps facilitate evaluation of the system and measure adequacy of benefits for injured workers and their dependents, and also provides statistical data for research. After initial development with input from affected groups, the first phase of WCIS became operational in September of 1999. Electronic transmission of first reports of injury was required beginning Mar. 1, 2000 and electronic versions of benefit notices were mandated as of Jul. 1, 2000. Electronic reporting of medical billing data is required for any medical service that occurs on or after Sep. 22, 2006.
Statutes and regulations
Workers’ compensation information system (WCIS) proposed regulations - Workers' compensation information system final regulations
Information and resources
- WCIS Advisory committee meeting - June 1, 2009
- WCIS e.News
-
WCIS claim statistics: reports, tables and papers - WCIS medical lien data training - handouts

- Introduction to electronic data interchange (EDI) service providers
- International Association of Industrial Accident Boards and Commissions (IAIABC)
Research Studies
Evaluating the Permanent Disability Rating Schedule
- Uncompensated wage loss for injured workers with permanent disabilities
version - Wage loss for injured workers with permanent disabilities
version - Return to work rates for injured workers with permanent disability
version
First report and subsequent report of injury data reporting
- Electronic data interchange trading partner profile

- California EDI trading partner insurer/claim administrator ID list

- Frequently asked questions
- California EDI implementation guide for first and subsequent reports of injury. Version 2.1 February 2006

- IAIABC EDI Implementation Guide for first and subsequent reports of injury. Release 1.0, February 2002
The IAIABC EDI Implementation Guide for Medical Bill Payment Records, Release 1.1 (effective July 1, 2009), can be obtained from the IAIABC at either the IAIABC website at http://www.iaiabc.org/i4a/pages/index.cfm?pageid=3349, or by contacting
| IAIABC 5610 Medical Circle, Suite 24 Madison, WI, 53719-1295 Telephone: (608) 663-6355 Fax: (608) 663-1546
|
The IAIABC Guide is also available for inspection (but not copying) Department of Industrial Relations Division of Workers’ Compensation 1515 Clay Street, 17th Floor Oakland, California 94612, between 9:00 A.M. and 4:30 P.M., Monday through Friday. |
- IAIABC issues resolution request (IRR) MED547R1.0

- California EDI implementation guide for medical bill payment records. Version 1.0, December 2005

- Frequently asked questions
- WCIS medical data training modules
- Medical trading partners profile and FTP connectivity procedures
- WCIS checklist for a variance for medical bill reporting

- IAIABC EDI Implementation Guide for Medical Bill Payment Records. Release July 1, 2002
If you have questions, comments regarding WCIS email us at wcis@dir.ca.gov.
November 2009


