Yes, it is. An experience mod rate is a rating assigned to a workers’ comp insurance policy that affects the final cost of the insurance premium for the employer. A workers’ comp impairment rating is a completely different kind of rating that is assigned to the worker – not the business. It rates the overall level of impairment that the worker has sustained due to a work-related injury or illness. This impairment rating is then factored into the amount that they may receive in workers’ compensation disability payments.