Subject to subclause (II), for 2014 and subsequent years, the amount (or amounts) that would otherwise be applicable under clause (i)(III) shall be adjusted by a percentage determined appropriate by the Secretary to reflect such factors as changes in the number of visits in an episode, the mix of services in an episode, the level of intensity of services in an episode, the average cost of providing care per episode, and other factors that the Secretary considers to be relevant. In conducting the analysis under the preceding sentence, the Secretary may consider differences between hospital-based and freestanding agencies, between for-profit and nonprofit agencies, and between the resource costs of urban and rural agencies. Such adjustment shall be made before the update under subparagraph (B) is applied for the year.
The Secretary shall provide for a 4-year phase-in (in equal increments) of the adjustment under subclause (I), with such adjustment being fully implemented for 2017. During each year of such phase-in, the amount of any adjustment under subclause (I) for the year may not exceed 3.5 percent of the amount (or amounts) applicable under clause (i)(III) as of March 23, 2010.