Here are a few of the major sources of health and medical statistics:

US Health Statistics Sources

• Agency for Health Research and Quality (AHRQ) for Health Care Utilization (HCUP) and Medical Expenditures (MEPS).
• CDC National Center for Health Statistics (NCHS) for US health statistics, including community health status indicators. Access, visualize, and download estimates for more than 180 different health topics in the NCHS Data Query System. 
• Centers for Medicare & Medicaid Services (CMS) for spending, enrollment and claims data.
• StatsPolicy.gov is a decentralized network of agencies led by the U.S. Chief Statistician, OMB, and the Interagency Council on Statistical Policy (ICSP) that generate high-quality statistical information.
• NIH Institutes and Offices for disease specific statistical information starting points.
• NLM MedlinePlus Health Statistics topic page for links to selected health statistics sources; MedlinePlus Health topic pages for links to disease-specific statistics sources.
• NLM National Information Center on Health Services Research and Health Care Technology (NICHSR):
  • Finding and Using Health Statistics for a self-study course on the subject.
• US Census Bureau for vital health and other statistics.
• Injuries, Illnesses, and Fatalities (IIF) for annual reports on workplace injuries, illnesses, and fatal injuries from the Bureau of Labor statistics.

International Health Statistics Sources

• World Health Organization (WHO) Global Health Observatory (GHO) for data, tools, analysis and reports by country or health topic.
• United Nations UNdata and other international sources of data.
• Pan American Health Organization for Regional Core Data and other international statistical information.
• EU Health Statistical Reports for reports from Eurostat, the statistical office of the European Union.
• UK National Statistics for data from United Kingdom by topic or department for statistical release announcements.

Hospital and Health Facilities Statistics

• American Hospital Association. National organization representing hospitals and health care networks. Includes fast facts on number of US hospitals, staffed hospital beds, and admissions. 
• American Hospital Directory. Louisville (KY): American Hospital Directory; 2000- . Contains some free hospital profiles, and state and national hospital statistics. More detailed statistics require a subscription. 
• National Ambulatory Medical Care Survey (NAMCS) collects and releases high-quality, objective, reliable information about how ambulatory medical care services are provided and used in the United States.