[Code of Federal Regulations] [Title 42, Volume 2] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 42CFR403.250] [Page 41] TITLE 42--PUBLIC HEALTH CHAPTER IV--CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 403_SPECIAL PROGRAMS AND PROJECTS--Table of Contents Subpart B_Medicare Supplemental Policies Sec. 403.250 Loss ratio calculations: General provisions. (a) Basic formula. The expected loss ratio is calculated by determining the ratio of benefits to premiums. (b) Calculations. The insuring organization must calculate loss ratios according to the provisions of Sec. Sec. 403.251, 403.253, and 403.254.