THE PERMANENTE MEDICAL GROUP, Permissibly Self-Insured; ATHENS ADMINISTRATORS (Adjusting Agent), Defendant(s). Applicant, Dianne Benson, began working as a file clerk for The Permanente Medical Group in April 1992. If there was no substantial medical evidence to justify separately assigning a percentage of permanent disability to either injury, apportionment was not permitted. Thus, each separate injury requires a separate analysis of the medical evidence to determine the causative sources of disability. Indeed, a medical report that fails to offer an opinion on apportionment of each separate injury cannot be considered substantial medical evidence to justify an award of permanent disability.

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