This 2004 compendium describes regulatory provisions and Medicaid policy for residential care settings in all 50 states and the District of Columbia. It updates an earlier report completed in 2002. Information was collected between February and June 2004 by reviewing state websites and regulations and calling key state contacts to verify information. Section 1 provides an overview of residential care and assisted living policy. Section 2 presents six tables, which compare states' policy in selected areas. Section 3 provides summaries of each state's regulations and policy for residential care settings, including assisted living facilities. [510 PDF pages] This report was updated in 2007; see "Residential Care and Assisted Living Compendium: 2007" at http://aspe.hhs.gov/daltcp/reports/2007/07alcom.htm.