On June 22, 2009, the Centers for Medicare & Medicaid Services (CMS) published an advance notice of proposed rulemaking announcing its intention to amend its regulations implementing Medicaid home and community-based services waivers under section 1915(c) of the Social Security Act. The notice solicits advance public comments on the merits of providing states the option to combine or eliminate the existing three permitted waiver targeting groups (i.e., aged or disabled, or both; mentally retarded or developmentally disabled, or both; and mentally ill). Comments also are solicited on the most effective means to define home and community. Comments will be accepted until August 21, 2009.