Robert Dittmar tallies it:
In 2011, Medicare and Medicaid payments totaled $949 billion, while receipts for Medicare totaled $174 billion. This means that government spending on medical expenditures outstripped revenues by $775 billion, which represents 58% of the 2011 Federal deficit. Other revenue and spending mismatches account for the remaining 42%, but the medical expenditure mismatch is the overwhelming source of the Federal government’s deficit. Probably even more telling is the cumulative amount of the excess of expenditures over revenues. By 2011, this difference had cumulated to—you probably guessed it—about $9 trillion.
The Dish 