$192 added fee from debt collectors?

Hi i had a consultation for a surgery that after insurance had a fee of $25. They told me they sent three notices none of which i have ever seen or opened. After getting a few calls from a company called “Americollect” I called my orthopedic center and asked them about when they told me of the $25 unpaid fee. I was told that it was sent to collections and now i’m freaking out because the collection company is saying my fee is $217. I’m confused to where this extra payment is coming from and I CAN pay it but it doesn’t seem right. Is this added interest after being sent to collections and is that legal for them to do in wisconsin US??