dr. scott gotl irgs eb is a senior policy adviser to the centers for medicare and medicaid services. good to see you. why is this a concern about possibly seeing a sharp uptick in the costs under your prescription drug coverage? >> two issues. one is the co-pays are high. on average it's 40% you have to pay on oh branded drugs compared to 25% in the private sector. the big issue is the list of drugs aren't long. if the drugs aren't covered you're on your own. you have to pay for it out of pocket. the money you spend on drugs doesn't count against your out of pocket limits or against your deductible. this could cost patients with special conditions, patients who need special drugs money. literally tens of thousands of dollars a year. >> i know you referenced a drug that's commonly used to treat multiple sclerosis. c orks prko copaxon? >> correct. a lot of drugs for arthritis, multiple sclerosis weren't in the formformula. so patients had to pay for them out of pocket. this is different from commercial insurance f. a drug isn't ton formula there will be coinsurance meaning you are resp