1. Short title This Act may be cited as the Addiction Treatment Access Improvement Act of 2018 . 2. Allowing for more flexibility with respect to medication-assisted treatment for opioid use disorders (a) Conforming applicable number Subclause (II) of section 303(g)(2)(B)(iii) of the Controlled Substances Act ( 21 U.S.C. 823(g)(2)(B)(iii) ) is amended to read as follows: (II) The applicable number is— (aa) 100 if, not sooner than 1 year after the date on which the practitioner submitted the initial notification, the practitioner submits a second notification to the Secretary of the need and intent of the practitioner to treat up to 100 patients; or (bb) 275 if the practitioner meets the requirements specified in section 8.610 of title 42, Code of Federal Regulations (or successor regulations). . (b) Eliminating any time limitation for nurse practitioners, clinical nurse specialists, certified registered nurse anesthetists, certified nurse midwives, and physician assistants To become qualifying practitioners Section 303(g)(2)(G)(iii)(II) of the Controlled Substances Act ( 21 U.S.C. 823(g)(2)(G)(iii)(II) ) is amended by striking during the period beginning on the date of enactment of the Comprehensive Addiction and Recovery Act of 2016 and ending on October 1, 2021 and inserting beginning on the date of enactment of the Comprehensive Addiction and Recovery Act of 2016 . (c) Definition of qualifying other practitioner Clause (iv) of section 303(g)(2)(G) of the Controlled Substances Act ( 21 U.S.C. 823(g)(2)(G) ) is amended by striking nurse practitioner or physician assistant each place it appears and inserting nurse practitioner, clinical nurse specialist, certified registered nurse anesthetist, certified nurse midwife, or physician assistant .