42 CFR 456.21 : Public Health (Part 1 To Parts 1009-1099) — (§ 430.0 To Part 481) — Centers For Medicare & Medicaid Services, Department Of Health And Human Services (Continued) (§ 430.0 To Part 481) — Medical Assistance Programs (§ 430.0 To § 456.725) — Utilization Control (§ 456.1 To § 456.725) — Utilization Control: All Medicaid Services (§ 456.21 To § 456.23) — Scope.