“Very thankful for everything they did for us. Always responsive, reassured us every step of the way and obtained a great result.”
Miguel Orellana
✦ Certified Specialist in Workers’ Compensation Law — Certified by the State Bar of California, Board of Legal Specialization ✦
A denial is not the end. It’s the beginning of our fight for your benefits.
By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization
In California, a denied Newhall workers' comp claim is overturned through the §5402(b) 90-day presumption, an IMR appeal under §4610.5, or a Petition for Reconsideration under §5903 (25 mailed / 20 electronic). Yazdchi Law, a Certified Specialist firm, handles Henry Mayo Newhall / Old Newhall denial files at the Newhall WCAB. Request a free case review.
A denied Newhall workers' comp claim is rarely the end of the road. Most denials at the Newhall WCAB arrive on one of three patterns: a Henry Mayo Newhall Hospital med-surg nurse's lumbar disability fight after the §5402(b) 90-day window has lapsed (opening the presumption-of-compensability under California Labor Code §5402); an Old Newhall restaurant worker's slip-and-fall back case after a UR cycle under California Labor Code §4610 blocked treatment authorization (opening the IMR appeal under California Labor Code §4610.5); or a flat written denial within the 90-day window contesting AOE-COE on a cumulative-trauma date-of-injury fight under California Labor Code §3208.1.
Each pattern carries a different leverage profile. The §5402(b) lapse converts the file to presumed-compensable, rebuttable only by reasonable-diligence evidence. The §4610 UR denial routes to IMR under California Labor Code §4610.5 on a 30-day clock and lands a binding decision through Maximus. The AOE-COE denial is litigated at the Newhall WCAB through an Application for Adjudication, with the §5814 25% penalty under California Labor Code §5814 layered on the delayed-benefit record. Healthcare and Old-Newhall hospitality files at the Newhall WCAB hit all three patterns regularly.
Yazdchi Law's office at 1125 W Avenue M-14, Suite A in Palmdale serves the Newhall WCAB on denied-claim files. Eman Yazdchi handles the §5402(b) presumption fight, the §4610.5 IMR cycle, and the §5903 Petition for Reconsideration phase, and is a Certified Specialist in Workers' Compensation Law, certified by the California Board of Legal Specialization, State Bar of California.
A denied Newhall workers' comp claim is built around five California Labor Code sections that do most of the work: California Labor Code §5402(b) (the 90-day decision-window presumption), California Labor Code §4610.5 (Independent Medical Review on UR denials), California Labor Code §5814 (the 25% penalty on unreasonable delay), California Labor Code §5900 (the framework section authorizing reconsideration), and California Labor Code §5903 (the 25-day/20-day Petition for Reconsideration deadline).
Under California Labor Code §5402(b), once an injured Newhall worker files a DWC-1 claim form, the insurer has 90 days to accept or deny the claim. If the insurer misses the 90-day window, the injury is presumed compensable — and that presumption can only be rebutted by evidence the insurer could not have discovered with reasonable diligence during the 90 days. On a Henry Mayo Newhall Hospital med-surg nurse's lumbar disability fight, the §5402(b) presumption is leverage because Henry Mayo Newhall / Old Newhall insurers routinely sit on a DWC-1 while waiting on a QME panel under California Labor Code §4062.2 or a UR cycle under California Labor Code §4610 — both of which can blow past the 90-day window. California Labor Code §5402(c) also requires up to $10,000 in immediate medical treatment within one day of the DWC-1, regardless of the 90-day status — a Newhall delay on the §5402(c) duty surfaces a separate §5814 25% penalty.
If the Newhall insurer's Utilization Review under California Labor Code §4610 denies a treatment request — surgery, physical therapy, prescriptions, medical-legal evaluation — the worker appeals through Independent Medical Review within 30 days under California Labor Code §4610.5. An independent physician reviewer reads the medical record against the Medical Treatment Utilization Schedule and either upholds or overturns the denial. The IMR decision is binding except on narrow grounds under California Labor Code §4610.6 — the five enumerated grounds being procurement by fraud, material conflict of interest, bias on a constitutionally protected basis, mistake of fact not subject to expert opinion, or plainly erroneous express or implied finding of fact.
Under California Labor Code §5814, when a California workers' comp insurer unreasonably delays or denies a benefit owed to a Newhall worker, a 25% penalty attaches to that delayed benefit — temporary disability not paid timely under California Labor Code §4650, medical treatment not authorized under California Labor Code §4600, permanent disability advances not paid on schedule under California Labor Code §4658. The penalty applies per benefit unreasonably delayed, not once per case. The Newhall workers' comp judge applies California Labor Code §5814 after a focused evidentiary showing on the dated delay record.
On an Old Newhall restaurant worker's slip-and-fall back case, a Petition for Reconsideration under California Labor Code §5900 is filed at the Newhall district WCAB within 25 days of mail service of the workers' comp judge's adverse decision (20 days if served electronically via EAMS under Title 8 CCR section 10605). On the typical Henry Mayo Newhall / Old Newhall denial appeal, the Petition identifies one or more of the §5903 grounds: newly discovered evidence on the Henry Mayo patient-handling spinal cases and Old-Newhall hospitality slip-and-fall files, an unreasonable factual finding on the §5402(b) presumption or the QME apportionment under California Labor Code §4663, or an error of law on the §5402(c) one-day duty or the §5814 penalty record. The WCAB either grants reconsideration and modifies the decision, or denies. A denial opens the Writ of Review path under California Labor Code §5950 within 45 days.
Injured at work in Newhall? Call (661) 273-1780
Tap to call →Newhall denied-claim appeals are heard at the Van Nuys district office of the Workers' Compensation Appeals Board at 15400 Sherman Way, Suite 500. Yazdchi Law regularly appears at the Van Nuys WCAB on denied-claim appeals, including those that involve the California Labor Code §5402(b) 90-day presumption, the California Labor Code §5814 25% penalty, and the California Labor Code §5903 25-day (mailed) / 20-day (electronic) Petition for Reconsideration deadline. Related coverage: Newhall workers' comp claims.
A Henry Mayo Newhall Hospital med-surg nurse's lumbar disability fight typically receives the §5402 denial after the §5402(b) 90-day window has run, opening the presumption-of-compensability argument under California Labor Code §5402(b). An Old Newhall restaurant worker's slip-and-fall back case typically receives the denial after a UR cycle under California Labor Code §4610 held the treatment authorization past statute, opening the IMR appeal under California Labor Code §4610.5 plus the §5814 25% penalty on the delay. The Henry Mayo patient-handling spinal cases and Old-Newhall hospitality slip-and-fall files produces a high concentration of these layered-denial files on the Newhall docket.
On an Old Newhall restaurant worker's slip-and-fall back case, the §5402 denial often runs alongside a separate California Labor Code §4553 50% serious-and-willful penalty argument. Under §4553, when the Newhall employer knew of a Title 8 safety order violation and failed to correct it, the worker recovers a 50% penalty on the compensation owed. The Henry Mayo patient-handling spinal cases and Old-Newhall hospitality slip-and-fall files sometimes produces a documented Cal/OSHA Title 8 citation that locks in the §4553 record. Filed at the Newhall WCAB alongside the underlying denial dispute, the §4553 issue often moves the insurer's denial settlement materially.
Last reviewed by Eman Yazdchi, Esq., May 2026.
Ready to discuss your case? Schedule a free consultation.
Schedule Free ConsultationRead more testimonials →“Very thankful for everything they did for us. Always responsive, reassured us every step of the way and obtained a great result.”