Not only that but it is against the law to inform the parents that the kid was a mental case. This information was also not available for the background check.
Your correct, My wife and I were surprised that my son’s doctor could no longer talk to us about his medical condition since he just turned 18 in his senior year of high school. You still think of him as your child not as an adult. He had to sign a waiver for the doctor so he could keep us informed.