"The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA; P.L. 108173) requires the Medicare Board of Trustees to provide in its annual reports an expanded analysis of Medicare expenditures and revenues (§801 of the MMA). Specifically, if the Medicare trustees determine that general revenue funding for Medicare is expected to exceed 45% of Medicare outlays for the current fiscal year or any of the next six fiscal years, a determination of excess general funding is made. If the determination is issued for two consecutive years, a funding warning is issued which triggers certain presidential and congressional actions related to the introduction and consideration of legislation designed to respond to the warning (§§802-804 of the MMA)."
CRS Report for Congress, RS22796