CMS is inviting comments from Part D sponsors and other interested stakeholders on how the Medicare Part D program can more successfully address inappropriate overutilization of drugs. By “overutilization,” CMS means the filling of multiple prescriptions written by different prescribers at different pharmacies for the same or therapeutically equivalent drugs in excess of all medically-accepted norms of dosing (particularly for opioids, antiretrovirals, and atypical antipsychotics). CMS notes that these patterns are considered highly-indicative of drug-seeking behavior due to drug abuse or diversion. CMS is accepting comments until October 31, 2011.