Preexisting disease.

RCW 51.32.100
in effect
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If it is determined that an injured worker had, at the time of his or her injury, a preexisting disease and that such disease delays or prevents complete recovery from such injury, it shall be ascertained, as nearly as possible, the period over which the injury would have caused disability were it not for the diseased condition and the extent of permanent partial disability which the injury would have caused were it not for the disease, and compensation shall be awarded only therefor. If it is determined that an injured worker had, at the time of his or her injury, a preexisting disease and that such disease delays or prevents complete recovery from such injury, it shall be ascertained, as nearly as possible, the period over which the injury would have caused disability were it not for the diseased condition and the extent of permanent partial disability which the injury would have caused were it not for the disease, and compensation shall be awarded only therefor.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=51.32&full=trueFetched: 6/29/2026

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