This 2007 report examines the role that State Medicaid agencies play in the funding, managing, and monitoring mental health services.  The report presents the results of phone interviews with State Medicaid directors or their designees. 

From the report:

State Medicaid agencies are playing an increasing role in funding, managing, and monitoring public mental health services in States, reflecting the steady growth over the last three decades in the share of public mental health services funded by Medicaid. Yet relatively little is known on a State-by-State basis about how Medicaid agencies are exercising their responsibilities for mental health services. The survey described in this report begins to fill that gap.

Full report: http://mentalhealth.samhsa.gov/publications/allpubs/sma07-4301

U.S. Dept. of Health and Human Services, Substance Abuse and Mental Health Services Administration (SAMHSA). (2007). Administration of mental health services by Medicaid agencies. Verdier J, Barrett A, Davis S.