Which program provides health insurance primarily for seniors in the United States?

The program that provides health insurance primarily for seniors in the United States is Medicare. Established in 1965, Medicare is a federal health insurance program designed to assist individuals aged 65 and older, as well as certain younger people with disabilities or specific diseases. It was designed to ensure that older adults have access to necessary medical services, including hospital stays, outpatient care, preventive services, and prescription medications.

Medicaid, while providing health coverage, primarily caters to low-income individuals and families, including children, pregnant women, and people with disabilities, rather than focusing solely on seniors. Social Security is a social insurance program that provides financial assistance to retirees and certain disabled individuals, but it does not provide health insurance coverage. CHIP, or the Children's Health Insurance Program, is aimed at providing health coverage for children in families with incomes too high to qualify for Medicaid but too low to afford private coverage.

By focusing on seniors, Medicare serves as a crucial part of the healthcare system in the U.S., helping to alleviate the burden of medical costs for older adults and ensuring they have access to essential health services as they age.