Medicare paid a tiny group of doctors $3 million or more apiece in 2012. One got nearly $21 million. Those are among the findings of an Associated Press analysis of physician data released Wednesday by the Obama administration, part of a move to open the books on health care financing. Topping Medicare's list was Florida ophthalmologist Salomon Melgen, whose relationship with Sen. Robert Menendez, D-N.J., made headlines last year after news broke that the lawmaker used the doctor's personal jet for trips to the Dominican Republic. Medicare paid Melgen $20.8 million.