Washington L&I: Fax Number for Existing Claims

What is Washington L&I's fax number for workers' comp claims?

Washington State Department of Labor & Industries confirms a fax, 360-902-4565, on its own Contact Information by Subject page, under Workers' Comp Claims for Job Injuries, tied to the Claims Administration office. This is for sending documents into a claim that already exists, not for starting a new one. L&I's own worker-facing "File a Claim" page lists only FileFast, phone, or your doctor's office for a new claim, no fax option appears there.

Where to fax

• Documents for an existing claim (worker or representative): fax 360-902-4565. Source: Washington L&I's own Contact Information by Subject page.
• New claim filing (injured worker): not by fax, use FileFast, phone (1-877-561-FILE), or your doctor's office.

Fax number verified 2026-09-17.

Which route should I use?

1. If you're filing a brand-new claim, don't search for a fax number, use FileFast, phone, or your doctor's office at your first visit.
2. Use the fax number only for sending additional documents to an already-open claim.
3. Address the fax to Claims Administration, PO Box 44291, Olympia WA if mailing instead.

Handling a claim in another state? See how to fax the Oregon WCD or New Jersey Temporary Disability's fax numbers.