1. Short title This Act may be cited as the The Reforming and Expanding Access to Treatment Act or the TREAT Act . 2. Payments to States under Medicaid for substance abuse services furnished to inmates in public institutions Section 1905 of the Social Security Act ( 42 U.S.C. 1396d ) is amended— (1) in subsection (a)(16)— (A) by striking and, (B) for individuals and inserting , (B) for individuals ; and (B) by inserting before the semicolon at the end the following: , and (C) qualified inpatient substance use disorder services (as defined in such subsection) for inmates of a public institution (as such terms are defined for purposes of applying the subdivision (A) that follows paragraph (29)) ; and (2) in subsection (h), by adding at the end the following new paragraph: (3) For purposes of subsection (a)(16)(C), the term qualified inpatient substance use disorder services means medication or behavioral treatment administered in furtherance of eliminating, mitigating, treating, or curing an individual’s use or abuse of drugs or an individual’s substance abuse disorder. . 3. No SAMSHA policy against substance abuse treatment for incarcerated individuals The Substance Abuse and Mental Health Services Administration shall not establish, maintain, or implement any memorandum of understanding or other policy that prohibits or restricts the Administration’s provision or support of substance abuse treatment or related services for incarcerated individuals, so long as such provision or support— (1) is statutorily authorized (by provisions of law other than this section) for such type of treatment or services; and (2) not statutorily prohibited or restricted with respect to incarcerated individuals.