MRO, a leader in the secure, compliant and efficient exchange of Protected Health Information (PHI), today announced it ranked No. 4620 on Inc. magazine’s 37th annual Inc. 5000—an exclusive ranking of the nation’s fastest-growing private companies. MRO’s appearance on the annual list is a rare fourth showing after the company ranked No. 3988 in 2017, No. 3903 in 2016, and 3290 in 2015.