There are many federal programs that support Americans, however those most directly related to health include Agriculture, Food and Nutrition Services, and Rural Development.
Some of the programs within these three agencies include: Supplemental Nutrition Assistance Program (SNAP), Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), Rural Development Single and Multi-Family Housing, National School Lunch Program.
These federal health programs were hard fought and need to be updated to improve coverage for their specific populations.