; (ii) is authorized to prescribe or dispense narcotic drugs to individuals for maintenance treatment or detoxification treatment; and (iii) has in effect a waiver in accordance with section 303(g) of the Controlled Substances Act for such purpose and is otherwise in compliance with regulations promulgated by the Substance Abuse and Mental Health Services Administration to carry out such section. (B) Addiction specialists For purposes of subsection (e)(1)(B)(iv), the term addiction specialist means a physician that possesses expert knowledge and skills in addiction medicine, as evidenced by appropriate certification from a specialty body, a certificate of advanced qualification in addiction medicine, or completion of an accredited residency or fellowship in addiction medicine or addiction psychiatry, as determined by the Secretary. (d) Participation of applicable beneficiaries (1) Applicable beneficiary defined In this section, the term applicable beneficiary means an individual who— (A) is entitled to, or enrolled for, benefits under part A and enrolled for benefits under part B; (B) is not enrolled in a Medicare Advantage plan under part C; (C) has a current diagnosis for an opioid use disorder; and (D) meets such other criteria as the Secretary determines appropriate. Such term shall include an individual who is dually eligible for benefits under this title and title XIX if such individual satisfies the criteria described in subparagraphs (A) through (D). (2) Voluntary beneficiary participation