Centers for Medicare & Medicaid Services (CMS)
http://www.cms.gov/
Arthritis Foundation
http://www.arthritis.org/
American Heart Association
http://www.americanheart.org
American Cancer Society
http://www.cancer.org
American Diabetes Association
http://www.diabetes.org/
American Medical Association
http://www.ama-assn.org/
Medicare
http://www.medicare.gov/
MedicineNet – Health and Medical Information Produced by Doctors
http://www.medicinenet.com
National Association for Home Care and Hospice
http://www.nahc.org/
U.S. Department of Health & Human Services
http://www.hhs.gov/