I believe the problem is that do not have 40 quarters paid into Medicare. https://www.hhs.gov/answers/medicare-and-medicaid/who-is-eligible-for-medicare/index.html

They could go back to work for the required income. https://www.ssa.gov/oact/cola/QC.html

The client can buy Medicare A, but it is expensive https://www.medicare.gov/your-medicare-costs/part-a-costs

NOT and income tax question, but it is helpful to learn about SS and Medicare to help our clients.