I went to get a standard STD panel at an urgent care a few weeks back. I asked how much it would be beforehand (since I don't have insurance). The front desk person said "between $100 and $200". I left and paid $340 - which pissed me off but whatever. Then, the following week, I received a bill from the lab testing for $380. That infuriated me. In total I spent $720 after being initially quoted max $200.

I tried to fight it but medical billing places remind me of the South Park episode about Cable Companies (where they're rubbing their nipples as the callers describe how they're being exploited). Truly an asinine system.