The article explores the shift in prescription coverage for dual eligible mental health patients from Medicaid to Medicare Part D in 2006.  The authors note that a reduction in the number of plans and increases utilization of psychotropic drugs raises concerns about access to medication for individuals with mental illness.  The authors suggest possible changes to Medicare's enrollment and risk-sharing systems. 

Donohue, J. M., H. A. Huskamp, et al. (2009). Dual eligibles with mental disorders and Medicare part D: how are they faring? Health Affairs, 28(3): 746-59. DOI: 10.1377/hlthaff.28.3.746 http://content.healthaffairs.org/cgi/content/abstract/28/3/746