appropriate percent otherwise applied to an ACO because of the application of an increase under the previous sentence for another ACO. . (e) Demonstration for allowing growth of HCC scores Section 1899(d)(1)(B)(ii) of the Social Security Act ( 42 U.S.C. 1395jjj(d)(1)(B)(ii) ) is amended by adding at the end the following: In carrying out this subsection, the Secretary shall establish a 3-year demonstration project that develops and applies a methodology, similar to the Medicare Advantage normalization factor applied under section 1853(a)(3), that allows growth of HCC scores for those who are continuously enrolled with an ACO. The Secretary shall submit to Congress a report on the results of such demonstration project. . (f) Creating incentives for ACO development The Secretary of Health and Human Services may develop a mechanism to make permanent those ACO-related pilot programs, including the Advance Payment ACO Model, that the Secretary determines have been successful. The Secretary shall submit to Congress a report on the mechanism and shall include in the report such recommendations, including such changes in legislation, as the Secretary determines appropriate.