Workers' compensation information system (WCIS)

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 March 1, 2000 and electronic versions of benefit notices were mandated as of July 1, 2000. Electronic reporting of medical billing data is required for any medical service that occurs on or after Sept. 22, 2006.

Statutes and regulations

Information, resources and training

Research Studies

Evaluating the Permanent Disability Rating Schedule

First report and subsequent report of injury data reporting (FROI & SROI)

Implementation Guides

Medical bill payment record reporting

Implementation Guides

WCIS Meetings

Archive of materials of past WCIS advisory meetings

Contact us

Please e-mail questions or comments regarding WCIS to

What's New

April 2017