Unfortunately, if the debt has been turned over to the collection aganecy by the doctor's office that you went to, the doctor's office has most likely assigned all interests it has in the debt to the third party collection company and as such, no longer has an interest in the debt.Since this seems to be what happened, your recourse assuming you want the debt paid off is to pay the third party collection company the amount owed, preferably in some form other than cash so that you have a receipt for what you paid.