OBJECTIVE:The aim of this study was to assess the impact of a new workers’ compensation medical assessment model on loss of earnings (LOE) benefits duration. METHODS:A medical assessment model was introduced incorporating return to work planning and inclusion of the workerʼs treating physician. Impact of the program on LOE benefit duration was assessed using a quasi-experimental pre–post study design. Cox PH multivariable regression was adjusted for age, gender, injury severity, time to referral, and industry. RESULTS:The study population comprised 3146 workers1794 assessed pre-intervention and 1574 assessed after introduction of the new model. There was a significant reduction in LOE benefit duration for workers assessed in the new model (hazard ratio 1.33, 95% confidence interval 1.23–1.43). CONCLUSIONS:The probability of being off LOE benefits for workers assessed in the new program was 33% greater than for workers assessed in the prior program.