The current minimum age restriction for Medicare eligibility is 65 years, according to the Centers for Medicare & Medicaid Services. However, this age restriction does not apply to people who receive Social Security disability payments for two years or suffer from specific medical conditions, states CMS.
Individuals above the age of 65 are eligible for Medicare Part A and Part B if the applicant or spouse has worked long enough to earn at least 40 credits required to be eligible for Medicare. As of 2015, there is no other age restriction applicable to Medicare. Individuals who have been diagnosed with amyotrophic lateral sclerosis or Lou Gehrig's disease are eligible for Medicare from the first month of their diagnosis, according to Medicare Interactive.
Recipients of Social Security Disability Insurance for more than two years become eligible in the month when they receive their 25th payment, notes Medicare Interactive. Patients who suffer from End Stage Renal Disease and require dialysis or a kidney transplant have no age restrictions to be eligible for Medicare coverage, reports CMS.