I am on disability insurance through the hospital. But the hospital disputes my leave regularly. Every month, I have to go to the doctor to confirm my illness. He changes the diagnosis, because the hospital would deny my leave otherwise. He diagnoses me with situational depression. I can't say that my daughter has cancer or the hospital would deny my leave. Unfortunately, that is how the system works for someone in the health care field.
That is my experience. Sadly, there are a number of us nurses who have a child with cancer. Their experience was the same as mine, so I already knew how things worked. It really takes a toll, emotionally, to have to fight for leave, on top of having to fight for your child.