I don't know all the details about the federal disability programs, but, I do know once a child qualifies they receive medical coverage of Medicare A, Medicare B, Medicare D (optional medication coverage) and/or Medicaid. Medicaid can be applied for now if there is a low income to the family.

I am fairly sure Michigan took the expanded Medicaid program of the ACA. 

The parents just have to start applying. They should keep a file if they can.

"Lead and a Healthy Diet" (click here).  It is written by the EPA.