Sections 456.201 through 456.245 of this subpart prescribe requirements for a written utilization review (UR) plan for each mental hospital providing Medicaid services. Sections 456.205 and 456.206 prescribe administrative requirements; §§456.211 through 456.213 prescribe informational requirements; §§456.231 through 456.238 prescribe requirements for continued stay review; and §§456.241 through 456.245 prescribe requirements for medical care evaluation studies.