MDSI is a provider of medical and disability evaluations in the United States. Evaluations are performed at 75 clinic loction ... s, with corporate headquarters located in Ogden, Utah. MDSI is an established leader in the medical disability field using highly innovative technologies and processes, making possible a remarkably comprehensive and accurate system of producing and reporting evaluation findings. MDSI never comprimises on it's commitment to the highest standards in delivering quality evaluations consistently and on a timely basis. read more