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By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization
In California, Labor Code section 5500 establishes the California Workers' Compensation Appeals Board Application for Adjudication of Claim — the formal pleading that initiates WCAB jurisdiction over a contested California workers' compensation case and starts the adjudication process before a WCAB judge.
California Labor Code section 5500 establishes the California Workers' Compensation Appeals Board Application for Adjudication of Claim — the formal pleading that the California injured worker (or in limited cases the California employer) files to initiate WCAB jurisdiction over a contested workers' compensation case. Under section 5500, the California Application transforms the dispute from an administrative claim handled by the California insurer's adjuster into a formal adjudicative proceeding before a WCAB judge. The section 5500 California Application is required before most contested issues can be heard — disputes about California Labor Code §4660 California PD rating, California Labor Code §4600 California treatment denials, California Labor Code §4663 California apportionment, and California settlement approval all flow through a section 5500 California Application.
Under California Labor Code section 5500, the California Application for Adjudication is filed when the California injured worker or the California employer needs WCAB intervention to resolve a contested issue. The section 5500 California Application is typically filed after the California insurer denies the claim under the California Labor Code §5402 California 90-day rule, after a California Labor Code §4610 California utilization-review denial, when California Labor Code §4660 California PD rating disputes cannot be settled, when California Labor Code §4663 California apportionment is contested, or when the parties need WCAB approval of a compromise-and-release settlement. The section 5500 California Application must be filed within the California Labor Code §5405 California one-year statute of limitations measured from the date of injury, with extensions for California Labor Code §5412 California cumulative-trauma cases.
Under California Labor Code section 5500, the California Application form (DWC-1A) must contain specific identifying information: the California injured worker's name and contact information; the California employer's name and address; the California workers' compensation insurance carrier name; the date of injury and a brief description of how the injury occurred; the body parts injured; and the issues the California applicant seeks to adjudicate before the WCAB. The section 5500 California Application is filed with the appropriate WCAB district office (typically the office covering the California worker's residence) and is served on the California employer and insurer; the California filing fee is nominal but the section 5500 California Application is jurisdictionally critical.
Under California Labor Code section 5500 (worker Application), California Labor Code section 5501 (employer petition), and California Labor Code §5402 (90-day acceptance/denial rule), the California pleading framework lets either side initiate WCAB jurisdiction. Section 5500 California is filed by the injured worker after a California Labor Code §5402 California denial or when contested issues arise; California Labor Code section 5501 California is the parallel pleading filed by the employer. The California Labor Code §5402 California 90-day rule typically triggers section 5500 California — when the insurer fails to accept or deny within 90 days, the section 5500 California Application is filed.
Under California Labor Code section 5500, California Labor Code §5405 (one-year statute), and California Labor Code §5412 (cumulative-trauma date of injury), the California Application filing must respect the statute of limitations. The California Labor Code §5405 California one-year statute runs from the date of injury and bars the section 5500 California Application if the deadline passes. For California Labor Code §5412 California cumulative trauma, the date of injury is when the worker became aware of the disability and its industrial cause — the section 5500 California Application can be filed years after the original exposure. Section 5500 California protects the right to WCAB adjudication.
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Tap to call →Last reviewed by Eman Yazdchi, Esq., May 2026.
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