As mandated by the ACA, the OIG has issued its annual report ("Part D Plans Generally Include Drugs Commonly Used by Dual Eligibles: 2012") assessing the extent to which Medicare Part D formularies include drugs commonly used by full-benefit, Medicare/Medicaid dual-eligible individuals. Based on a review of the 3,107 Part D plans operating in 2012, the OIG determined that 96% of the plans cover 191 drugs commonly used by dual eligibles, and 61% of these drugs are included by all Part D plan formularies. On average, 24% of the unique drugs were subjected to utilization management restrictions (i.e., prior authorization, step edits, or quantity limits) on Part D plan formularies, up from 19% in 2011; most of this increase is attributable to an increase in the use of quantity limits.