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Theresa Mitchell

Theresa Mitchell, Attorney at Law

Ontario, California · 23 Years Experience

4.4/5.0 (381 client reviews) Avvo 8.6

About Theresa Mitchell

Theresa Mitchell has been fighting for injured workers in Ontario, California for over 23 years. After witnessing clients struggle against large insurance companies alone, she dedicated her career exclusively to workers' compensation law. She has recovered millions in benefits for clients and is known throughout California for her aggressive approach to denied claims.

Construction InjuriesScaffold AccidentsWorkers Compensation

Practice Areas

  • Workers Compensation
  • Personal Injury
  • Social Security Disability

Frequently Asked Questions

Theresa Mitchell works on a contingency fee basis, meaning you pay nothing unless you win. If your case is successful, the attorney's fee is a percentage of your settlement or award — typically 15–25% in California. There are no upfront costs and no fees if you don't recover.

Theresa Mitchell handles all types of workers' compensation cases in California, including Construction Injuries, Scaffold Accidents, Workers Compensation, denied claims, permanent disability ratings, and workers' comp appeals.

In California, you generally must report your injury to your employer within 30 days and file a formal claim within 1–2 years of the injury date. These deadlines are strict — missing them can cost you your benefits. Contact Theresa immediately after any workplace injury.

Yes — claim denials are one of Theresa Mitchell's specialties. Insurance companies routinely deny valid claims hoping workers won't fight back. With 23 years of experience in California workers' comp law, Theresa knows exactly how to appeal denials and fight for the benefits you're entitled to.

Theresa Mitchell primarily serves clients in Ontario and the surrounding California area, but handles cases throughout the state. If you're in California and were injured at work, contact Theresa's office for a free consultation regardless of your location.

Education & Credentials

  • J.D. Suffolk University School of Law
  • Bar California State Bar, admitted 2003
  • Mbr California Workers' Compensation Bar Association