A report by the Inspector General revealed that between the fiscal years 2009-2011, the Department of Health and Human Services spent $120.6 million under Medicare Parts B and D to cover illegal immigrants.
Under the category “unlawfully present beneficiaries,” the IG report states:
We identified $91.6 million in improper payments to unlawfully present beneficiaries in Part B during CYs 2009 through 2011. When CMS received untimely information indicating that unlawful presence overlapped with the dates of service on previously paid Medicare claims, CMS did not notify Medicare's contractors of this updated information, and the contractors did not detect and recoup improper payments. For the same period, we estimated $29 million in gross drug costs associated with unlawfully present beneficiaries in Part D.