[Code of Federal Regulations] [Title 12, Volume 1] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 42CFR456.151] [Page 335] TITLE 42--PUBLIC HEALTH CHAPTER IV--CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued) PART 456--UTILIZATION CONTROL--Table of Contents Subpart D--Utilization Control: Mental Hospitals Sec. 456.151 Definitions. As used in this subpart: Medical care appraisal norms or norms means numerical or statistical measures of usually observed performance. Medical care criteria or criteria means predetermined elements against which aspects of the quality of a medical service may be compared. These criteria are developed by health professionals relying on their expertise and the professional health care literature. Certification of Need for Care