; or (B) with a substance use disorder diagnosis for purposes of treatment of such disorder or co-occurring mental health disorder, as determined by the Secretary. (6) In this subsection, the term applicable practitioner means the following: (A) A physician assistant, nurse practitioner, or clinical nurse specialist (as defined in section 1861(aa)(5)). (B) A clinical social worker (as defined in section 1861(hh)(1)). (C) A clinical psychologist (as defined by the Secretary for purposes of section 1861(ii)). (D) A marriage and family therapist (as defined in section 1861(lll)(2)). (E) A mental health counselor (as defined in section 1861(lll)(4)). .