The OIG has issued a report entitled "States' Collection of Medicaid Rebates for Physician-Administered Drugs." In short, the OIG found that most states comply with the Deficit Reduction Act (DRA) requirements that states collect Medicaid drug rebates for certain physician-administered drugs, and that national drug codes (NDCs) be included on physician-administered drug claims. More than half of the states reported difficulties with manufacturer nonpayment of all of the requested rebates for physician-administered drugs, however, which states attributed to mainly to inaccuracies in NDC information entered on claims by providers (particularly the number of units billed). The OIG also found that 31 states had not implemented certain steps necessary for collecting rebates on all eligible physician-administered drugs purchased by 340B entities. The OIG recommends that CMS: (1) take action against states that do not meet the DRA's requirements to collect rebates on physician-administered drugs, (2) ensure that all states are accurately identifying and collecting such rebates, (3) work with states to develop guidance for edits for physician-administered drug claims, (4) work with States to administer guidance to providers and Medicare contractors about the physician-administered drug rebate requirements, and (5) ensure that the NDC crosswalk is complete and accurate, and that it identifies rebateable physician-administered drugs.