I owe 100k out of pocket for rehab

I need some advice pls and idek if this is the right place to post but. I'm currently under my dad's health insurance and I went to rehab and then a sober living. I was at the sober living for three months ish but my dad got rid of his insurance for a month that I was there. As in I was just at the sober living no insurance. Now my bill is around 100k out of pocket. Is there literally anything I can do to fix this.