[frumper]

If a child isn't covered by medicaid for income reasons, then CHIP is a program that kicks in to cover kids at higher income levels. These are all federally backed state run programs though so it's going to be hard to figure out exact details and surely someone is slipping through some cracks. Some states combine the programs, some have both. They can vary on the income levels. There is also some level of transition as the paperwork can be cumbersome, unclear and confusing, so kids may be kicked out of the programs while these processes play out, usually with retroactive statuses of eligibility.