In order to be eligible for an HSA, you must be enrolled in a high deductible health plan (HDHP) that is HSA-eligible.
You must also not be enrolled in Medicare and you cannot be claimed as a dependent on someone else’s health plan. Your health insurance must also be part of a high deductible plan with substantial out-of-pocket costs.
How Does a Health Savings Account Work?
Where Should I Put my Healthcare Savings?
What is Medicare and Medicaid?