What the panel ordered
The Appeals Board granted the Petition for Reconsideration, rescinded the August 8, 2025 Findings of Fact and Orders, and returned the case to the trial level for further proceedings consistent with the opinion.
Applicant filed a Petition for Reconsideration of the Findings of Fact and Orders issued August 8, 2025, which denied his claim of industrial injury. The WCJ's Report recommended denial of the Petition. The Appeals Board granted reconsideration, rescinded the FF&O, and returned the case to the WCJ for further proceedings to develop expert medical opinion and reconsider witness credibility.
What was disputed, and how it came out
Each issue the panel decided, with the reasoning it gave. An outcome is what this panel did on this record — not a rule, and not a prediction.
The Appeals Board found insufficient expert medical evidence on causation and injury, requiring further development of the record with expert medical opinion. The WCJ's credibility findings were to be revisited after such evidence is obtained.
From the decision · page 1Applicant filed a Petition for Reconsideration (Petition) of the Findings of Fact and Orders (FF&O) issued August 8, 2025, wherein the workers' compensation administrative law judge (WCJ) found that applicant failed in his burden of proving he sustained industrial injury to his back, hips, ankle, diabetes, internal, and psyche arising out of and in the course of his employment.
The facts that decided it
What the panel treated as outcome-determinative, and which side it favoured.
Insufficient expert medical evidence on causation and injury to applicant's lumbar spine at L4-5 level.
Favours neutral
Required further development of the record with expert medical opinion to determine industrial causation.
From the decision · page 8On this record the issue of injury to applicant's lumbar spine at the L4-5 level is a medical determination, which requires expert medical opinion. It is unclear if the findings at the L4-5 level are pre-existing, idiopathic, otherwise of non-industrial origin, the result of cumulative injury, or a result of the claimed injury. Here the truth is occult and can be found only by resorting to the sciences. (Peter Kiewit Sons, supra.)
Applicant's credibility was questioned due to unclear injury date, contradictory medical reports, and inconsistent testimony.
Favours Defendant prevailed
Credibility findings impacted the denial of injury but are to be revisited after expert medical opinion is obtained.
From the decision · page 7The court concludes that the applicant lacks the requisite credibility to find in his favor. The date of injury is unclear, the day of the injury is unclear, the August 12 medical report reflects a denial of injury (contrary to his testimony), the treating doctor reports deny any prior injuries (although he has a prior history of pain and injuries), and the testimony over a made-up car accident makes no sense and is contradictory. On top of this is the fact that Dr. Jiang produced a report dated June 10, 2024 (i.e., two months before the alleged injury) stating that the applicant had "[l]ow back pain, unspecified" and "[e]ncounter for screening for depression]".
What the panel did with the medical opinions
The role the physician served, and the weight the opinion carried. Physicians are named here as the decision names them; we do not score them.
Opined 100% of applicant's disability/impairment is compensable and directly attributable to the industrial injury of 08/08/2024. Found applicant's account of work duties and injury incident viable and medically reasonable.
From the decision · page 9On October 21, 2024, Andrew Mooney, D.C., stated "it is my professional medical opinion that 100% of the applicant' s disability/impairment is compensable with and directly attributable to his specific industrial injury of 08/08/2024 while employed at LEK Enterprises," and further "I find that the applicant's presentation of the facts of his work duties and incident of injury relating to his claimed industrial injuries as viable and medically reasonable." (Exhibit 13, Andrew Mooney, D.C., October 21, 2024, page 10.) However as pointed out by the WCJ in the opinion on decision above, chiropractor Mooney did not review or comment on the back pain noted in the Johnny Jiang, P.A., note of June 10, 2024.
Issued Doctor's First Report of Occupational Injury or Illness with diagnosis of Generalized Anxiety Disorder consistent with applicant's account of injury, dated 08/08/2024.
From the decision · page 9The January 30, 2025, Doctor's First Report of Occupational Injury or Illness issued by Alma Garcia, supervised by Ana Nogales, Ph.D., shows an August 8, 2024, date of injury, (Exhibit 7, Alma Garcia, supervised by Ana Nogales, Ph.D., January 30, 2025, PDF page 2,) and findings and diagnosis were consistent with applicant's account of injury. (Exhibit 7, Alma Garcia, supervised by Ana Nogales, Ph.D., January 30, 2025, PDF page 3.) However, this report also does not review nor comment on the back pain noted in the Johnny Jiang, P.A., note of June 10, 2024.
The rules the panel named
Authorities as the decision cited them, with how this panel applied each one.
Labor Code sections 5903, 5952(d); Lamb v. Workmen's Comp. Appeals Bd. (1974) 11 Cal.3d 274; Garza v. Workmen's Comp. Appeals Bd. (1970) 3 Cal.3d 312; LeVesque v. Workers' Comp. Appeals Bd.
A decision must be based on admitted evidence and supported by substantial evidence.
The decision must be supported by substantial evidence in the record.
From the decision · page 7A decision must be based on admitted evidence in the record and must be supported by substantial evidence. (Lab. Code, § 5903, 5952(d); Lamb v. Workmen's Comp. Appeals Bd. (1974) 11 Cal.3d 274, 281 [39 Cal.Comp.Cases 310]; Garza v. Workmen's Comp. Appeals Bd. (1970) 3 Cal.3d 312, 317 [35 Cal.Comp.Cases 500]; LeVesque v. Workers' Comp. Appeals Bd.
McAllister v. Workers' Comp. Appeals Bd. (1968) 69 Cal.2d 408
Medical evidence that industrial injury was reasonably probable constitutes substantial evidence for injury AOE/COE.
Medical expert opinion is required to establish injury causation.
From the decision · page 8Medical evidence that industrial injury was reasonably probable, although not certain, constitutes substantial evidence for a finding of injury AOE/COE. (McAllister v. Workers' Comp. Appeals Bd. (1968) 69 Cal.2d 408, 417 [33 Cal.Comp.Cases 660].) Although the factual issue of the occurrence of the alleged incident is a determination for the WCJ, the issue of injury is a medical determination, which requires expert medical opinion. As the Court of Appeal explained in Peter Kiewit Sons v. Industrial Acc. Com. (1965) 234 Cal.App.2d 831, 838 [30 Cal.Comp.Cases 188]: "Where an issue is exclusively a matter of scientific medical knowledge, expert evidence is essential to sustain a [WCAB] finding; lay testimony or opinion in support of such a finding does not measure up to the standard of substantial evidence. Expert testimony is necessary where the truth is occult and can be found only by resorting to the sciences."
Peter Kiewit Sons v. Industrial Acc. Com. (1965) 234 Cal.App.2d 831
Expert medical opinion is essential where the issue is exclusively scientific medical knowledge.
Expert testimony is necessary to sustain a finding of injury.
From the decision · page 8Medical evidence that industrial injury was reasonably probable, although not certain, constitutes substantial evidence for a finding of injury AOE/COE. (McAllister v. Workers' Comp. Appeals Bd. (1968) 69 Cal.2d 408, 417 [33 Cal.Comp.Cases 660].) Although the factual issue of the occurrence of the alleged incident is a determination for the WCJ, the issue of injury is a medical determination, which requires expert medical opinion. As the Court of Appeal explained in Peter Kiewit Sons v. Industrial Acc. Com. (1965) 234 Cal.App.2d 831, 838 [30 Cal.Comp.Cases 188]: "Where an issue is exclusively a matter of scientific medical knowledge, expert evidence is essential to sustain a [WCAB] finding; lay testimony or opinion in support of such a finding does not measure up to the standard of substantial evidence. Expert testimony is necessary where the truth is occult and can be found only by resorting to the sciences."
Hegglin v. Workmen's Comp. Appeals Bd. (1971) 4 Cal.3d 162
Medical reports and opinions are not substantial evidence if based on erroneous facts, inadequate histories, or incorrect legal theories.
Medical opinions of record were found flawed due to lack of review of prior conditions and inadequate history.
From the decision · page 9"Medical reports and opinions are not substantial evidence if they are known to be erroneous, or if they are based on facts no longer germane, on inadequate medical histories and examinations, or on incorrect legal theories. Medical opinion also fails to support the Board's findings if it is based on surmise, speculation, conjecture or guess." (Hegglin v. Workmen's Comp. Appeals Bd. (1971) 4 Cal.3d 162, 169 [36 Cal.Comp.Cases 93].
What proof carried it
The evidence the panel weighed, by kind.
Applicant's credibility was questioned due to unclear injury date, contradictory medical reports, and inconsistent testimony.
From the decision · page 7The court concludes that the applicant lacks the requisite credibility to find in his favor. The date of injury is unclear, the day of the injury is unclear, the August 12 medical report reflects a denial of injury (contrary to his testimony), the treating doctor reports deny any prior injuries (although he has a prior history of pain and injuries), and the testimony over a made-up car accident makes no sense and is contradictory. On top of this is the fact that Dr. Jiang produced a report dated June 10, 2024 (i.e., two months before the alleged injury) stating that the applicant had "[l]ow back pain, unspecified" and "[e]ncounter for screening for depression]".
Supervisor's testimony confirmed applicant worked the week of injury and reported sciatica but continued working.
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About this page
- A published decision of the California Workers' Compensation Appeals Board, taken apart by what it turned on. The Board publishes the decision itself; this page adds the extraction and quotes the passage behind every claim.
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