Between August 1999 and January 2002, Anthony T. Lo Sasso, PhD, and researchers at Northwestern University analyzed the extent to which co-payments for substance abuse treatment influenced people's utilization of treatment services.
The project was part of the Robert Wood Johnson Foundation's (RWJF) national Substance Abuse Policy Research Program (SAPRP).
- Participation in outpatient treatment is likely to drop as co-payments increase.
- Higher co-payments had a significant effect on whether people returned to treatment after completing earlier treatment episodes.
- The average outpatient co-payment was about $16 per visit.