A) Medicaid is a different program. Yes, you will need to fill out another application form. Medicaid primarily depends on the state in which you live, your income, and your family size. Across the board, Medicaid covers low-income families, their children, pregnant women, and adults with disabilities who do not have a means to manage their condition on their own.
The qualifications will vary depending on whether your state has opted in for Medicaid expansion or not; those that have opted in will have a larger range of the population eligible for Medicaid benefits.