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✦ Certified Specialist in Workers’ Compensation Law — Certified by the State Bar of California, Board of Legal Specialization ✦
By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization · Cal Bar #285231
A Newbury Park worker has 20 days to file a Petition for Reconsideration and 25 more days to take a Writ of Review. Tech-campus, Thousand Oaks biotech, and Conejo Valley trade files are heard at the Oxnard district WCAB. Certified Specialist Eman Yazdchi (California Board of Legal Specialization, State Bar of California) prepares the Petition and the writ.
Three statutory stages: a Petition for Reconsideration to the Appeals Board within 20 days, then a Writ of Review to the California Court of Appeal within 25 days.
"Appealing" a California workers' compensation decision is not the same as appealing a civil judgment. The system uses its own multi-step ladder. The first step is the Petition for Reconsideration filed with the Workers' Compensation Appeals Board itself under California Labor Code §5900 and California Labor Code §5903. From there, an aggrieved party seeks Court of Appeal review by writ of review under California Labor Code §5950. Every step has a hard deadline; missing a deadline ends the appeal regardless of merit.
Newbury Park appeals come up out of the workforce concentrated in Amgen Thousand Oaks campus workers, the 101 biotech corridor, professional services. the Amgen Thousand Oaks campus workforce on the Newbury Park side of the 101 produces the kinds of disputed permanent-disability ratings, apportionment fights, and serious-and-willful penalty rulings that drive appeals. A judge's Findings & Award at trial — issued from the Oxnard district office — is the order an appeal targets, and the appeal goes first to the seven-commissioner Appeals Board in San Francisco, not to a state court.
Yazdchi Law's office at 1125 W Avenue M-14 in Palmdale sits about 65 miles southwest of Palmdale via the 5 and the 101. We do not staff a Newbury Park satellite — we are honest about that. We appear at the Oxnard district WCAB, which hears Newbury Park cases. Eman Yazdchi is a Certified Specialist in Workers' Compensation Law, certified by the California Board of Legal Specialization, State Bar of California.
The Petition is filed at the Oxnard district office, served on every party, then transmitted to the seven-commissioner Appeals Board in San Francisco for review.
The Petition for Reconsideration is the workhorse of California workers' compensation appeals. It is filed with the same district WCAB that issued the Findings & Award, and it goes from there to the seven-commissioner Workers' Compensation Appeals Board in San Francisco for de novo review on the record.
Under California Labor Code §5900, any party aggrieved by a final order, decision, or award of a workers' compensation judge can petition the Appeals Board for reconsideration. The Appeals Board has the power to affirm, modify, rescind, or grant a new trial on the order. For a Newbury Park worker, that means a Findings & Award denying compensability, fixing an unfair permanent disability rating, denying a serious-and-willful penalty under California Labor Code §4553, or imposing an apportionment percentage under California Labor Code §4663 can all be reopened on Reconsideration.
Under California Labor Code §5903, a Petition for Reconsideration is due within 25 days of the date of service of the Findings & Award when service is by mail, or within 20 days when service is electronic. The deadline is statutory and jurisdictional — the Appeals Board cannot extend it. A Newbury Park worker who learns of an adverse Findings & Award at day 24 of a mailed service has one calendar day to get the Petition for Reconsideration on file. The grounds are limited to the five categories listed in California Labor Code §5903: the Appeals Board acted without or in excess of its powers; the order was procured by fraud; the evidence does not justify the findings of fact; newly discovered evidence; or the findings of fact do not support the order.
The Petition is filed at the Oxnard district office, served on every party, and then transmitted to the seven-commissioner Workers' Compensation Appeals Board in San Francisco. Within 60 days, the Appeals Board either grants, denies, or grants and dismisses the Petition. If the Petition is granted, the Appeals Board issues a written Opinion and Decision after Reconsideration that affirms, modifies, or rescinds the underlying Findings & Award. The Newbury Park case stays at the district office in the interim; no further trial proceedings happen until the Appeals Board acts.
Under California Labor Code §5950, an aggrieved party can petition the California Court of Appeal for a writ of review within 45 days of the Appeals Board's denial or final decision after reconsideration. The Court of Appeal review is on the record and is limited to whether the Appeals Board acted within or in excess of its powers, whether substantial evidence supports the order, and whether the order is reasonable and consistent with the Act. The Court of Appeal does not retry the Newbury Park case; it reviews legal error on the record built at the Oxnard WCAB. Writs are granted in a minority of cases.
Related on yazdchilaw.com: California workers' comp appeal pillar guide · Leimert Park workers' comp appeal · Monterey Park workers' comp appeal · Newbury Park workers' comp lawyer · California Labor Code §5903 (Petition for Reconsideration deadline).
Three deadlines drive every California workers' comp appeal: 20 days (electronic) or 25 days (mail service) for a §5900 Petition for Reconsideration; 30 days for a §4610.5 IMR appeal of a Utilization Review treatment denial; 25 days from the reconsideration denial for a §5950 Writ of Review to the California Court of Appeal.
Under California Labor Code §5903 a Petition for Reconsideration must rest on one of six specific grounds — (a) the appeals board acted without or in excess of its powers; (b) the order, decision, or award was procured by fraud; (c) the evidence does not justify the findings of fact; (d) the petitioner discovered new evidence that could not, with reasonable diligence, have been produced at hearing; (e) the findings of fact do not support the order, decision, or award; (f) any other matter required by law. A verified Petition for Reconsideration must be signed under penalty of perjury and served on every party and lien claimant on the same day it is filed with the appeals board.
The Petition is filed at the Oxnard WCAB district where the underlying Workers' Compensation Judge (WCJ) ruling was issued, then transmitted to the seven-member Workers' Compensation Appeals Board in San Francisco for review. After filing, the assigned trial-WCJ prepares a Report and Recommendation on Reconsideration; the appeals board then issues a written decision either granting the petition (which usually orders a rehearing on a defined issue, sometimes en banc) or denying it. If the petition is denied, the only remaining remedy is a §5950 Writ of Review to the California Court of Appeal — a discretionary writ the court may grant or summarily deny within 60 days.
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Tap to call →Newbury Park appeals are filed at the Oxnard district WCAB and routed to the seven-commissioner Appeals Board in San Francisco for decision.
Newbury Park appeals begin at the Oxnard district office of the Workers' Compensation Appeals Board at 2220 E Gonzales Rd, Oxnard, CA 93036, where the Petition for Reconsideration is filed and served. The district covers Oxnard, Ventura, Camarillo, Simi Valley, Thousand Oaks, Moorpark, Fillmore, Port Hueneme, Santa Paula, Ojai, Newbury Park, Oak Park, and the rest of Ventura County. From there the Petition goes to the seven-commissioner Appeals Board in San Francisco. Yazdchi Law files Petitions at the Oxnard WCAB regularly and is familiar with the district's service rhythm — including how quickly the panel's electronic-service triggers the shorter 20-day deadline.
The strongest Reconsideration grounds are evidentiary — the Findings & Award is not supported by substantial evidence on the record. A QME or AME report that the judge mischaracterized, a Cal/OSHA citation the judge overlooked on a the Amgen Thousand Oaks campus workforce on the Newbury Park side of the 101 injury, or a permanent disability calculation that conflicts with California Labor Code §4660 all support Reconsideration. Yazdchi Law has handled Reconsideration Petitions on the ratings, apportionment, California Labor Code §4553, and California Labor Code §132a categories for Inland Empire / Ventura County workers and is familiar with the seven-commissioner panel's posture on those issues.
A pending Reconsideration Petition does not automatically stay payment of the underlying award. Temporary disability and accepted permanent disability indemnity continue while the Appeals Board considers the Petition unless a separate stay order issues. Treatment under California Labor Code §4600 continues. Closest acute-care facilities for ongoing care include Los Robles Health System (Thousand Oaks), Adventist Health Simi Valley. A defense Petition challenging a Newbury Park worker's award rarely stops payment in the interim — the worker generally continues to receive the indemnity ordered until and unless the Appeals Board rescinds the order.
Last reviewed by Eman Yazdchi, Esq., June 2026.
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