The claimant was involved in an accident in 2017. He applied to the LAT seeking CAT determination under Criteria 2,6, 7, and 8, as well as entitlement to NEBs, ACBs, and medical benefits. Causation was a key issue at the hearing. Adjudicator Hines held that the “but for” test was the appropriate test to determine causation. The crux of the dispute was whether the accident led to the progression of pre-existing peripheral arterial disease resulting in the above-knee amputation of the claimant’s right leg in September 2020. Adjudicator Hines found that the claimant was catastrophically impaired under Criteria 2 because the accident was a “but for” cause of the amputation, and entitled to NEBs, ACBs, chiropractic treatment, and the cost of CAT assessments. He was not entitled to the cost of a home exercise program. Adjudicator Hines allowed the insurer to rely on late-served CAT reports as they were responding to a new OCF-19 submitted by the claimant. Adjudicator Hines excluded an insurer addendum report as it was served two-days before the hearing and there was no reason why the causation issue addressed in the addendum report could not have been addressed in the initial report.