0TunesrlifeBest Answer 11 years ago "The nation's largest health insurance program, which covers nearly 40 million Americans. Medicare is a Health Insurance Program for people age 65 or older, some disabled people under age 65, and people of all ages with End-Stage Renal Disease (permanent kidney failure treated with dialysis or a transplant)."http://www.medicareconsumerguide.com/Part A OverviewPart A is hospital insurance provided by Medicare. Most people do not pay a premium for this coverage. Part A covers inpatient care in skilled nursing facilities, critical access hospitals, and hospitals. Hospice and home health care are also covered by Part A.