for children with medically complex conditions from out-of-State providers. The guidance provided by the State under the preceding sentence shall include information on how out-of-State providers who provide services to children with medically complex conditions enrolled in a health home in such State pursuant to this section may receive payment under the State plan under this title (or a waiver of the plan). (B) Best practices A State electing to provide medical assistance pursuant to subsection (a) shall, to the extent practicable, adopt best practices for providing access to out-of-State providers for children with medically complex conditions consistent with guidance issued by the Administrator of the Centers for Medicare & Medicaid Services pursuant to section 4 of the ACE Kids Act . The Administrator of the Centers for Medicare & Medicaid Services shall make available on a public Internet website of the Centers for Medicare & Medicaid Services a list of the States with a State plan amendment approved under this section and the degree to which (as determined by the Administrator) such States have adopted the best practices recommended by the Administrator in such guidance. (C) Mental health coordination A State shall consult and coordinate, as appropriate, with the Assistant Secretary for Mental Health and Substance Use, in addressing issues regarding the prevention and treatment of mental illness and substance use among children with medically complex conditions receiving home health services pursuant to this section. (D) Failure to implement best practices Beginning 180 days after the date on which guidance is issued by the Administrator of the Centers for Medicare & Medicaid Services pursuant to section 4 of the ACE Kids Act , in the case of a State with a State plan amendment approved under this section that the Administrator of the Centers for Medicare & Medicaid Services determines has not adopted the best practices recommended by the Administrator in such guidance, the increase of the Federal medical