1. Short title This Act may be cited as the Medicaid Coverage for Addiction Recovery Expansion Act . 2. State option to provide medical assistance for residential addiction treatment facility services; modification of the IMD exclusion (a) In general Section 1905 of the Social Security Act ( 42 U.S.C. 1396d ) is amended— (1) in subsection (a)(16)— (A) by striking and, (B) and inserting , (B) ; and (B) by inserting , and (C) effective January 1, 2019, residential addiction treatment facility services (as defined in subsection (h)(3)) for individuals over 21 years of age and under 65 years of age, if offered as part of a full continuum of evidence-based treatment services provided under the State plan, including residential, outpatient, and community-based care, for individuals with substance use disorders before the semicolon; and (2) in subsection (h)— (A) in paragraph (1), by striking paragraph (16) of subsection (a) and inserting subsection (a)(16)(A) ; and (B) by adding at the end the following new paragraph: (3) (A) For purposes of subsection (a)(16)(C), the term residential addiction treatment facility services means, subject to subparagraph (B), inpatient services provided— (i) to an individual for the purpose of treating a substance use disorder that are furnished to an individual for not more than 2 consecutive periods of 30 consecutive days, provided that upon completion of the first 30-day period, the individual is assessed and determined to have progressed through the clinical continuum of care, in accordance with criteria established by the Secretary, in consultation with the American Society of Addiction Medicine, and requires continued medically necessary treatment and social support services to promote recovery, stable transition to ongoing treatment, and discharge