you asked
‘Have Medicare cots come down? Have they even stopped going up as much?”
You realize that is a separate issue from whether Part D has had a positive effect on Medicare costs.
another fact on part d is that it has resulted in more poorer elderly having access to taking meds which again, reduces the need for medicare medical care.
another fact. the costs of the drugs have come down signicantly. More seniors are taking them but the cost per drug has come down
A simple “No, Medicare costs have continued to skyrocket and the 2003 law cost $53Billion last year” would have sufficed.