If an F1 student didn't pay for medical expenses and come back later as a visitor, would he be stopped at the airport?

I am an F1 Visa student with a $1,000 unpaid medical bill. There were 2 bills including physician bill and ER bill. I already paid the physician bill since the health insurance already paid part of it but I am not sure why it did not cover the ER bill that I did issue with the hospital but they return with no response. I left the country at the time my F1 status was over. Will this prevent me from entering America if I come back as visitor? Will they stop me from entering the country at the custom? if I made it to US, would they stop me when I am leaving the country after my visit? I used to study and would want to come back for traveling to other states.