Who is primarily eligible for Medicare?

The primary eligibility for Medicare is centered on two main groups: individuals aged 65 and older, and certain younger individuals who are deemed disabled according to Social Security guidelines. This program was established to provide health insurance primarily for seniors, addressing the unique health care needs and vulnerabilities that often accompany aging.

In addition to those over the age of 65, Medicare also extends coverage to younger individuals with specific disabilities or conditions, such as end-stage renal disease or amyotrophic lateral sclerosis (ALS). These criteria are aimed at ensuring that those who are permanently disabled can access necessary medical care, similar to those who are part of the aging population.

The other choices focus on different demographics. While low-income individuals might qualify for Medicaid, a separate program, Medicare does not exclusively serve this population. Military personnel have their own set of benefits under TRICARE and other programs, which are not part of Medicare. Employed individuals under the age of 65 typically do not qualify for Medicare unless they meet specific disability criteria. Thus, option B accurately captures the primary eligibility requirements for Medicare.