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Idaho PPD Ruling Turns 4% Impairment Into 34% Disability

The Idaho Supreme Court set aside a 20% disability award in Whiteley and found that the record supported 34%. The new reserve control is to value credible functional and vocational evidence separately from medical impairment and current wages.

By Sam, EditorSeptember 2026 · 3 min read

On September 1, 2026, the Idaho Supreme Court set aside the 20% permanent partial disability award in Whiteley v. Life Care Centers of America, concluding that the record supported 34%. The gap is striking because the worker’s permanent whole-person impairment was an undisputed 4%, and she earned more in her new job than she had before the injury.

The medical rating measured bodily impairment. Idaho’s broader permanent partial disability (PPD) analysis measures present and probable future ability to work, including nonmedical factors such as occupation, age, and competitiveness in the local labor market. Those are separate measures under Idaho Code section 72-425 and section 72-430.

Who it affects

The immediate audience is Idaho self-insured employers, group workers compensation programs, and third-party administrators (TPAs) with open lost-time files involving physically demanding work. Healthcare, construction, public safety, warehousing, and food-processing claims deserve attention when an employee has reached maximum medical improvement (MMI), returned to a lighter job, and shows little or no current wage loss.

The risk is concentrated in files where the case reserve effectively stops at the physician’s impairment percentage even though a functional-capacity assessment (FCA) or vocational report documents a narrower field of available work.

Reserve mechanism

This is a severity and case-adequacy issue, not a frequency change. Whiteley’s vocational expert measured a 68% loss of labor-market access and 0% wage-earning-capacity loss, then averaged the two to reach 34% PPD. The Commission selected 20%, inclusive of the 4% impairment, but offered no competing calculation. The Supreme Court rejected the Commission’s reliance on the treating physician’s lack of formal restrictions and on Whiteley’s apparently secure activities-director job. The employer’s own medical examiner had agreed with the FCA, and no opposing vocational analysis rebutted the 68% result.

The reserve miss can emerge after MMI. When a TPA later recognizes credible vocational evidence, the open-file case reserve rises and reported losses develop upward even though medical treatment has stabilized. That is the operational shift described in the case-reserve strengthening guide, and it belongs in the reported-loss diagnostic within a workers compensation IBNR review.

Do not generalize Whiteley’s 34% to every claimant with modified work. The holding turns on uncontroverted, mutually reinforcing evidence. But it does remove two comfortable reasons for a lower reserve: a small medical rating and continued employment at equal or higher pay. The distinction also matters when comparing Idaho files with systems where impairment directly drives scheduled benefits, as discussed in the Texas impairment-guide analysis. Likewise, current wages can conceal a different severity exposure than the one measured in the wage and indemnity analysis.

What this means for your next review

Ask for an exception report of open Idaho claims at MMI that combine an impairment rating below 10%, a changed or modified occupation, and an FCA or vocational report. Compare each disability case reserve with the supported vocational percentage, not just the physician’s rating. Then have the actuary test the aggregate sensitivity and identify whether post-MMI strengthening already appears in reported development. The first reserve pressure should appear in individual files as TPAs apply Whiteley; broader triangle effects will follow only after those revisions enter successive evaluations. Watch the Commission’s next order and the first later decisions citing Whiteley before treating 34% as an automatic outcome.

Sources

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