This report summarizes behavioral health diagnoses for Medicaid disabled adults served by the state medical and mental health systems during State Fiscal Year (SFY) 2007. Overall, there was a great deal of agreement between measures of mental illness constructed from the Medicaid Management Information System (MMIS) and the state administered mental health system. Specifically, Medicaid fee-for-service (FFS) claims and encounter data provided mental illness client population estimates that were comparable to measures derived from the Regional Service Network (RSN) Consumer Diagnostic records for adult Medicaid disabled clients, with a great deal of overlap in identifying individual cases. Findings suggest that MMIS claims and encounters are effective in identifying mental illness for adult Medicaid disabled clients who have not been served through the state administered mental health system.
