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Key Findings:

Overall, the evaluators found little to no evidence that MEPD affected inpatient admissions to IMDs or scatter beds in general hospitals, lengths of stays in IMDs or scatter beds, ER visits and ER boarding, discharge planning by participating IMDs, or the Medicaid share of IMD admissions of adults with emergency psychiatric conditions. Federal costs for IMD admissions increased, as expected, and costs to states decreased, while Medicaid and Medicare costs for other services increased in two states and were not affected in three. The extent to which these findings reflect the true effects of MEPD or were affected by data limitations or external events is difficult to determine.