[Code of Federal Regulations] [Title 42, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 42CFR456.145] [Page 349] 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 C_Utilization Control: Hospitals Sec. 456.145 Number of studies required to be performed. The hospital must, at least, have one study in progress at any time and complete one study each calendar year.