In the 1998–99 academic year, the NSIC became an expanded eight-team league from a previous seven-member conference by adding Wayne State College, and in 1999–2000 became a 10-member conference by adding Concordia University, St. Paul, and the University of Minnesota Crookston. The conference existed as an eight-member league from 2004–05 until 2005–06 with the departure of Minnesota–Duluth to the now defunct North Central Conference, and the University of Minnesota Morris to NCAA Division III. The University of Mary and Upper Iowa University were admitted in the fall of 2006 to again expand the NSIC to 10 members.