Acumen Physician Solutions is a Nashville, Tenn.-based information technology company that develops management tools for nephrology-specific medical practices and hospitals. The company was founded in 1996 as Health IT Services Group (HITSG). It had its roots in Gamewood Data Systems, a successful Internet service provider. Gamewood Data Systems was founded in 1991 by Drs. Frank and Dugan Maddux, husband-and-wife nephrologists who had developed one of the first laboratory electronic data interchange programs for the dialysis industry.