Reports summarize workers' compensation data for self-insured employers in Washington state. As you review the reports, please keep in mind that the data:

• Is reported by the self-insurer or their representative.
• Isn't independently reviewed for completeness or accuracy.
• Starts with January 2009, when full participation began.

Report assistance

Use these tools to help you understand the reports and the parameters used for the calculations.

• A Guide to the SIEDRS Aggregate Data Reports (730 KB PDF / 2 min).
• SIEDRS Enrollment Package (F207‑194‑000).
  • Cause of Injury Codes, pages 28 to 31 (1951 KB PDF / 6 min).
  • Nature of Injury Codes, pages 32 to 34 (1951 KB PDF / 6 min).
  • Body Part Codes, pages 35 to 37 (1951 KB PDF / 6 min).
  •  Get Help Downloading Files (files open in a new window).
• SIEDRS Risk Classes.