Chubb: Fax Number for Workers Comp Claim Reporting

What is the Chubb fax number for reporting a workers compensation claim?

Chubb accepts workers compensation injury reports by fax at 1-800-664-1765, 24 hours a day, seven days a week. This is a first-report-of-injury line: it is used by the employer to notify Chubb that a workplace injury has occurred. It is not a general claims fax, and it is not the number for sending documents into a claim that is already open.

• Report a workplace injury (first report) (Employer or policyholder, Workers compensation): fax 1-800-664-1765. Source: Chubb Claims FAQs.
• Send documents or medical bills into an open claim (Policyholder, injured employee, medical provider, All lines): Not published. Chubb assigns a fax number per claim, request it from your adjuster. Source: Chubb Claims FAQs.
• Report a personal, auto, marine, or accident and health claim (Policyholder, All other lines): No fax published. Phone, email, or online reporting. Source: Report a Claim.

^{Fax number verified September 17, 2026.}

Which route should I use?

1. If you are an employer and an employee has just been injured at work, fax the report to 1-800-664-1765, or call 1-800-699-9916. Chubb asks that injuries be reported within 24 hours of notice.
2. If a claim already exists and you need to send paperwork, call your adjuster and ask for the fax number assigned to that claim, or use Chubb's online claim document tool.
3. If you are an injured employee, report the injury to your employer. Your employer files with Chubb.

What to include before you send

Chubb asks for the policy number, the date of the injury, the location, and a short description of what happened. If the claim is already open, the claim number must appear on every page you send, because that is what routes the fax to the right adjuster. If you are sending from a desk rather than a machine, faxing from your computer keeps the whole packet in a single transmission.

Dealing with more than one insurer on the same incident is common. Our directory also covers Travelers' fax numbers, how to fax Selective Insurance, the Sentry Insurance fax page, State Farm's claims fax, and sending a fax to Progressive, each with its own destination and audience notes.