Healthy Living and Health Aging Demonstration Project Act of 2009 - Directs the Secretary of Health and Human Services, acting through the Administrator of the Centers for Medicare & Medicaid Services, to establish a demonstration project under which eligible partnerships are awarded grants to examine whether community-based prevention and intervention strategies, targeted towards pre-Medicare eligible individuals, result in: (1) lower rates of chronic diseases and conditions after such individuals become eligible for Medicare benefits; and (2) lower costs under Medicare.