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139 STAT. 291 PUBLIC LAW 119–21—JULY 4, 2025 (3) PART 447.—Section 447.56(a)(1)(v). (4) PART 457.— (A) Section 457.344. (B) Section 457.960. (C) Section 457.1140(d)(4). (D) Section 457.1170. (E) Section 457.1180. SEC. 71103. REDUCING DUPLICATE ENROLLMENT UNDER THE MED- ICAID AND CHIP PROGRAMS. (a) MEDICAID.— (1) IN GENERAL.—Section 1902 of the Social Security Act (42 U.S.C. 1396a) is amended— (A) in subsection (a)— (i) in paragraph (86), by striking ‘‘and’’ at the end; (ii) in paragraph (87), by striking the period and inserting ‘‘; and’’; and (iii) by inserting after paragraph (87) the following new paragraph: ‘‘(88) provide— ‘‘(A) beginning not later than January 1, 2027, in the case of 1 of the 50 States and the District of Columbia, for a process to regularly obtain address information for individuals enrolled under such plan (or a waiver of such plan) in accordance with subsection (vv); and ‘‘(B) beginning not later than October 1, 2029— ‘‘(i) for the State to submit to the system estab- lished by the Secretary under subsection (uu), with respect to an individual enrolled or seeking to enroll under such plan, not less frequently than once each month and during each determination or redetermina- tion of the eligibility of such individual for medical assistance under such plan (or waiver of such plan)— ‘‘(I) the social security number of such indi- vidual, if such individual has a social security number and is required to provide such number to enroll under such plan (or waiver); and ‘‘(II) such other information with respect to such individual as determined necessary by the Secretary for purposes of preventing individuals from simultaneously being enrolled under State plans (or waivers of such plans) of multiple States; ‘‘(ii) for the use of such system to prevent such simultaneous enrollment; and ‘‘(iii) in the case that such system indicates that an individual enrolled or seeking to enroll under such plan (or waiver of such plan) is enrolled under a State plan (or waiver of such a plan) of another State, for the taking of appropriate action (as determined by the Secretary) to identify whether such an individual resides in the State and disenroll an individual from the State plan of such State if such individual does not reside in such State (unless such individual meets such an exception as the Secretary may specify).’’; and (B) by adding at the end the following new subsections: Determination. Effective dates.