Labor Code 5500 Application for Adjudication of Claim

What the filing does

The filing opens the formal WCAB case. It does not prove the injury by itself or make benefits start that day.

Think of the application as the front door to the Workers' Compensation Appeals Board. Before it is filed, many disputes stay with the adjuster. After it is filed, the case can get a WCAB number, be served on the employer and insurer, and later be set for a hearing when a Declaration of Readiness is filed.

No pleadings other than the application and answer shall be required.

The form asks for basic facts: your employer, the insurance carrier if known, the injury date, the body parts hurt, how the injury happened, wages, disability time, treatment, and the issues in dispute. Those facts matter because they tell the judge what problem needs work.

When workers usually need it

Workers often file after a denial, a serious delay, a rating dispute, or a treatment fight that needs a judge.

You may need this filing when the insurer denies the injury, stops checks, refuses to pay the right rate, or disputes permanent disability. It can also help when the parties need a judge to approve a settlement. Filing is common after a claim denial under the 90-day rule, but it may also be used when the claim is accepted and one issue is still unresolved.

This filing is different from the DWC-1 claim form. The claim form tells the employer and insurer about the injury. The WCAB application opens the formal board case. In most current cases, the application is what gives the board power to decide benefits.

What deadlines still matter

The WCAB filing does not erase time limits. Most injury claims still need action within the legal filing period.

Many workers hear about the one-year filing deadline and wait too long because they hope the adjuster will fix the problem. That is risky. The deadline can depend on payment history, notice, injury type, and when a cumulative injury became clear. A worker should not treat a phone call with the adjuster as the same thing as a filed WCAB case.

How the paper should be handled

The form should be complete, served correctly, and matched to the right injury, employer, carrier, and disputed issues.

Small mistakes can slow the case. The form should match the real injury date, list the correct employer, and name the insurance company if it is known. For cumulative trauma, the start and end dates should be chosen with care. If there are several injury dates, there may be more than one case or a need to amend the filing.

Service also matters. The employer and carrier need notice. If you have a lawyer, the lawyer handles filing and service. If you file on your own, the WCAB instructions explain what the board serves and what you must serve later. Keep copies of every filed paper and every proof of service.