Apportionment Fight Case Study | Degenerative Imaging in California Comp

Why did the insurer blame degenerative imaging?

The carrier used an old MRI finding to argue that half of the worker's permanent disability came from degeneration, not the industrial back injury.

The injured worker had been treating for a work-related back injury for nearly two years. The claim had reached Maximum Medical Improvement. A QME issued a report with a significant whole-person impairment rating. Then the report cut the award in half.

The QME assigned fifty percent of the disability to non-industrial degenerative changes shown on pre-injury imaging. The insurer wanted to settle based on that reduced rating. The worker came to the firm with the report in hand and a hard choice: take the cut or fight the apportionment.

The problem was not that degeneration existed. Many working adults have disc wear on imaging. The problem was whether that wear caused disability before the job injury. The QME report did not clearly explain how the imaging caused the actual permanent work limits.

Eman Yazdchi challenged the apportionment opinion and pursued the higher, unapportioned award. The case turned on medical reasoning, not on a slogan about age or arthritis.

What does Labor Code 4663 require from a doctor?

Labor Code 4663 requires apportionment to be based on causation, with a doctor explaining the approximate work and non-work shares and the medical reason for the split.

Apportionment is a money issue. Each percentage assigned to non-work causes reduces the permanent disability paid by the employer. That is why a vague QME report can cause real harm.

Labor Code 4663 says apportionment must be based on causation. Labor Code 4664 says the employer is liable only for the disability caused by work. Those rules do not let the carrier guess. They require a medical explanation.

The verified framework for this fight is simple. Escobedo v. Marshalls is a WCAB en banc decision. It allows apportionment to asymptomatic degeneration only when the doctor gives substantial evidence showing the how and why. A bare reference to imaging is not enough.

How was the QME opinion challenged?

The challenge focused on the gap between imaging and disability, pressing the QME to explain whether the worker had actual impairment before the industrial injury.

The supplemental request did not argue that the MRI was fake. It asked the right question. What functional disability existed before the work injury? Did the worker lose time? Did the worker have restrictions? Did any doctor rate permanent impairment before the industrial event?

If the answer was no, the QME needed to explain why silent imaging deserved half the rating anyway. The report also had to explain why the job injury was not the full cause of the lasting work limits.

That approach narrowed the issue for the WCAB. The dispute was not about whether the spine showed wear. It was about whether the carrier had substantial medical evidence for the proposed split.

What changed the settlement posture?

Once the unsupported split was attacked, the carrier could no longer value the file as a routine degeneration case with a simple reduced rating.

The value of an apportionment challenge is often indirect. It changes the risk on both sides. A carrier that expected to pay half the rating now has to face the possibility of paying the full rating, future care, and any delayed amounts tied to the wrong valuation.

The worker also needed a clear record for trial. If the QME repaired the report with real reasoning, settlement could still follow. If the QME could not explain the split, the worker had a stronger path to reject the apportionment.

The final resolution preserved the higher award position. The specific outcome depended on the medical record, the QME testimony, the disability rating, and the settlement posture.

Why was accepting the first rating risky?

Accepting the first reduced rating would have locked in the carrier's view before the QME explained whether silent degeneration had caused real disability.

The first number was not the final answer. It was a medical opinion that could be tested. The worker needed to know whether the QME had reviewed the full job history, the old medical file, the lack of prior work loss, and the actual onset of symptoms.

A quick settlement would have ended that inquiry. It would have treated the old scan as proof by itself. That was the risk. Once a settlement closes, the worker may not get another chance to prove the full disability.

The better path was careful and narrow. Ask for the missing explanation. Compare the QME's split with the worker's history. Show that the worker had been doing the job before the industrial injury. Then value the case after the medical record was complete.

This approach did not promise a full win. It gave the worker a fair record. In an apportionment case, a fair record can change the money because the difference between a reduced rating and the full rating is often the core value of the file.

Where are apportionment disputes handled locally?

Apportionment disputes are decided through the WCAB case, with Greater Los Angeles workers often litigating through Van Nuys, LA, Long Beach, Pomona, San Bernardino, Riverside, or Oxnard.

This case study is not tied to a city-specific claim. Still, local medical-legal practice matters. QME panel choice, deposition habits, judge preferences, and defense counsel strategy can shape how an apportionment dispute resolves.

Yazdchi Law handles apportionment fights in Greater Los Angeles matters tied to Van Nuys, LA, Long Beach, Pomona, San Bernardino, Riverside, and Oxnard WCAB offices. The firm reviews the QME report, prior records, imaging, job duties, and work history before deciding whether the apportionment is worth fighting.

Eman Yazdchi is a Certified Specialist in workers' compensation law, certified by the California Board of Legal Specialization, State Bar of California. For a free review, call (661) 273-1780.

What should a worker bring for an apportionment review?

A worker should bring the QME report, MRI reports, prior medical records, job descriptions, work restriction history, and proof of full-duty work before the injury.

The review starts with the QME's words. Did the doctor explain the split, or just name degeneration? Then the review moves to the worker's real history. Full-duty work before the injury can be powerful. Old imaging is less powerful if it never caused treatment, missed work, or restrictions.

A good review also checks whether the doctor had the right records. Missing job facts or missing prior records can make an apportionment opinion look stronger than it really is.