If you qualify for health care coverage under Medicaid, you don't need to buy any other health insurance.
Only low-income individuals and families are eligible for Medicaid benefits. Medicaid is a federal program, but it's run by each state, so eligibility and benefits vary depending on where you live. Medicaid is also known by different names in a few states -- for example, in California, it's called Medi-Cal, in Oklahoma it's SoonerCare, and in Vermont, Green Mountain Care.
To learn more about your state's program, select your state from the list on this page.