Excellent "...collection of policy and regulatory materials related to health care..." Includes links to cases, statutes, and regulations, congressional testimony, news and reports. Covers topics such as antitrust, medicare/medicaid, quality assurance, public health, policy and administration, etc.
"The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency—making important discoveries that improve health and save lives." (from NIH website).
NIH is made up of 27 Institutes and Centers, each with a specific research agenda, often focusing on particular diseases or body systems, e.g. National Cancer Institute, National Institute on Aging, National Institute on Minority Health and Health Disparities, National Library of Medicine, etc..