Unforeseen Benefits:  Addiction Treatment Reduces Health Care Costs, July 2009.  Report produced by the Open Society Institute.

Some significant facts that the report shows is that 165,000 hospital stays surveyed in 2004 were related to substance abuse, and a drop of 26% to 37%  hospitalization occurred among patients receiving addiction treatment and counseling respectively.

Read the full report:  Unforeseen Benefits right here.