Are parent responsible for medical bills for a 20 year old in new york state with no medical insurance?

only if you are a student otherwise you left their protected wing when you turned 18. there are circumstances that may apply in keeping under parent's plan . like if you are totally disabled or cannot make a decision for yourself, but these cases fall under medicaid. so if you are not a student and are healthy you are going to get a bill from the hospital or doctor or both