[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: 42CFR407.15] [Page 264] TITLE 42--PUBLIC HEALTH CHAPTER IV--CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 407_SUPPLEMENTARY MEDICAL INSURANCE (SMI) ENROLLMENT AND ENTITLEMENT --Table of Contents Subpart B_Individual Enrollment and Entitlement for SMI Sec. 407.15 General enrollment period. (a) Except as specified in paragraph (b) of this section, the general enrollment period is January through March of each calendar year. (b) An unlimited general enrollment period existed between April 1 and September 30, 1981. Any eligible individual whose initial enrollment period had ended, or whose previous period of entitlement had terminated, could have enrolled or reenrolled during any month of that 6-month period. [[Page 265]]