¶1Claimant seeks review of an order of the Workers’ Compensation Board affirming, without discussion, the order of the referee, which denied an increase in the award of permanent disability. We reverse and remand.
¶2In August, 1984, claimant simultaneously suffered a myocardial infarction and a left shoulder injury while operating a front-end loader at work. He filed claims for both conditions, which were denied by SAIF, employer’s insurance carrier. Compensability of the myocardial infarction was resolved by a settlement, and the shoulder injury claim was litigated at a hearing. The referee concluded that the shoulder injury was separately compensable and reversed SAIF’s denial. SAIF did not appeal. The resulting determination order awarded claimant permanent partial disability.
¶3Claimant appealed the determination order, seeking permanent total disability or an increase in the permanent partial disability award for his shoulder. The referee affirmed the determination order. He found that claimant’s left shoulder symptoms were related to the myocardial infarction and not to any traumatic incident. Consequently, he concluded that the settlement encompassed the shoulder condition as well as the heart condition.
¶4SAIF concedes, and we agree, that the final order of the first referee determined that the shoulder injury was separately compensable and that that determination is effectively the law of the case. The referee and the Board erred in reconsidering the compensability of the shoulder condition.
¶5Claimant suggests that we can determine the extent of his disability. Our review is not de novo. ORS 183.482; Armstrong v. Asten-Hill Co., 90 Or App 200, 752 P2d 312 (1988).
¶6Reversed and remanded for reconsideration.