Stratum, incorporated in 1996, is a collaborative alliance originally formed by nine highly successful Midwestern medical groups. Stratum has selectively added Shareholders to expand strategically and now consists of sixteen owners, all of which are independent or hospital-owned, multi-specialty group practices located in Illinois, Indiana, Iowa, Kansas, North Carolina, Minnesota, Missouri and Wisconsin. Further, Stratum has expanded nationally and has client relationships with more than 100 additional healthcare organizations across the country. Collectively, Stratum represents approximately 11,000 physicians today.