Can I be barred from Medicaid if I just moved into Florida?
No, you can’t be barred. Medicaid is a federal program although the requirement and eligibility vary from state to state.
As long as you are a US citizen, a Florida resident or a resident alien and you meet the requirement of Florida, then you are eligible for Medicaid.
Also, the federal government regulations apply to all states, and it’s an infringement of the US constitution to enforce a residency requirement to an individual who moves to a state.