Finally managed to pay off oral surgery bill from 2004 - this after several years of painful, frustrating back-and-forth with insurance company (I did not nearly have that money then), me giving up, paying the bill in small increments. Sent in last payment last week, since am now dealing with a different set of medical payments and wanted to finish that one off. As you might imagine, before I had little motivation to give them money!
Got a call yesterday, called back today with trepidation. Billing person had found paperwork I never heard about and, long story short - I was right. All of the procedure was covered except the IV sedation, which I'd already paid off. I now get a credit of over $400.
It only took seven years! My irony, let me show it to you.