National Center for Health Statistics is the "Nation's principal health statistics agency." It compiles statistical information to guide actions and policies to improve the health of Americans.
Medicaid Statistics and Data-The Centers for Medicare & Medicaid Services (CMS) "offers researchers and other health care professionals a broad range of quantitative information on (its) programs, from estimates of further Medicare and Medicaid spending to enrollment, spending, and claims data. CMS also offers a broad range of consumer research to help its partners and staff.
Statehealthfacts.org (Kaiser Family Foundation) provides data on more than 450 health topics across all 50 states and the District of Columbia. Data are collected from a variety of public and private sources, including: original Kaiser Family Foundation reports, data from public Web sites, and information purchased from private organizations.
Data.gov (U.S. General Services Administration) aggregates datasets collected and disseminated by United States government agencies from every level, from federal to municipal. Users can browse datasets by topic or search the descriptions of the datasets.
HealthData.gov (U.S. Department of Health and Human Services) an aggregator of official government datasets that is specifically focused on health care information.
Data Census.gov (U.S. Census Bureau)) good source for population, housing, economic, and geographic information
Health Statistics (MedlinePlus) provides access to statistics and reports from various government agencies and independent organizations related to healthcare.
City of Chicago Data Portal (City of Chicago) searchable and manipulatable datasets collected by Chicago city government agencies. Most of the health care datasets currently consist of locations of public health care providers and disease incident rates.