that are relatively modest, quoted earlier, adjustments for oncology and rheumatology. is also adjustments up in the primary care arenas but we published an impact table because we want to be transparent about the current proposals affect. if adjustments are made we were then published a final impact table with the effects across practice types, also urban, rural, the type of issues we care deeply about them want to be transparent. >> all right, thanks. last year medicare part d spent about $20 billion on prescription drugs. does this sound about right? because shared by seniors, disabled. several drug countries that provide -- incher patience and medicare are getting the best out of and outcomes in return for a fair we enforcement. my question is does the proposed part d demonstration project help semester effectively evaluate value-based payment models for prescription drugs? and the second half of that is, is the first phase of demonstration necessary for advancing these alternative models for prescription drugs? >> yes. so we proposed the two-phase approach. they ar