Medicare’s conversion to using MBIs rather than HICNs has been pretty smooth, but hasn’t gone off without a hitch, according to a new HHS Office of Inspector General report. Centers for Medicare & Medicaid Services “controls were generally effective in ensuring that (1) beneficiaries were properly assigned MBIs, (2) deceased beneficiaries were not mailed new Medicare cards, and (3) payments were not made on behalf of deceased beneficiaries,” the OIG says in a new report. But they weren’t perfect. CMS did assign to 22,662 beneficiaries two or more MBIs associated with multiple enrollment records; mail 58,420 new Medicare cards after the beneficiaries’ dates of death; and make about $2.3 million in improper payments for claims with dates of service after beneficiaries’ dates of death. See the report, including the OIG’s recommendations to fix those issues, at https://oig.hhs.gov/oas/reports/region9/91903003.asp.