1. Short title This Act may be cited as the Mainstreaming Addiction Treatment Act of 2019 . 2. Eliminating separate registration requirement for dispensing narcotic drugs in schedule III, IV, and V for maintenance or detoxification treatment (a) In general Section 303 of the Controlled Substances Act ( 21 U.S.C. 823 ) is amended— (1) by striking paragraph (2) of subsection (g); and (2) in subsection (g), as amended— (A) by striking (g)(1) Except as provided in paragraph (2), practitioners who dispense narcotic drugs to individuals for maintenance treatment or detoxification treatment and inserting (g) Practitioners who dispense narcotic drugs (other than narcotic drugs in schedule III, IV, or V) to individuals for maintenance treatment or detoxification treatment ; (B) by redesignating subparagraphs (A), (B), and (C) as paragraphs (1), (2), and (3), respectively; and (C) in paragraph (2), as redesignated, by redesignating clauses (i) and (ii) as subparagraphs (A) and (B), respectively. (b) Conforming changes (1) Subsections (a) and (d)(1) of section 304 of the Controlled Substances Act ( 21 U.S.C. 824 ) are amended by striking 303(g)(1) each place it appears and inserting 303(g) . (2) Section 309A(a)(2) of the Controlled Substances Act ( 21 U.S.C. 829a ) is amended— (A) in the matter preceding subparagraph (A), by striking the controlled substance is to be administered for the purpose of maintenance or detoxification treatment under section 303(g)(2) and inserting the controlled substance is a narcotic drug in schedule III, IV, or V to be administered for the purpose of maintenance or detoxification treatment ; and (B) by striking and— and all that follows through is to be administered by injection or implantation; and inserting and is to be administered by injection or implantation