It is a state run program and every state is different. I have lived in Kentucky, Minnesota and Texas and have had the program in all three states and they were all different. In Minnesota the program has an annual cap of $15,000 per child. They will not pay anything over that. (At least that is what it was when I lived there).
When we moved to Texas we got the girls on the program but had problem after problem... no doctor wanted to accept it. It was a pain. We no longer qualify for it but we now have MDCP which provides Medicaid based on the child's health condition with no regard to parental income. That has been a lifesaver for us! Every state has a similar program to that as well, but again, with different qualifications.
When we moved to Texas we got the girls on the program but had problem after problem... no doctor wanted to accept it. It was a pain. We no longer qualify for it but we now have MDCP which provides Medicaid based on the child's health condition with no regard to parental income. That has been a lifesaver for us! Every state has a similar program to that as well, but again, with different qualifications.