Personally, I wouldn't take it back. I mean...it would have been tempting to have not paid MC today since the session was basically repairing a rupture, but...

Out of curiosity, do you have health insurance? If so, depending on what you have, some offer out-of-network benefits. Like my T and MC are out of network, we pay full amount up front, then insurance reimburses 60% of that. So they get their full fee, we just don't have to pay all of it. (It helps that H works for a health insurance company...)

Incidentally, current T and MC are both $175. Ex-T was charging me her earlier rate of $130, but now charges $150. They're all located in a pretty expensive area though (I live nearby in a considerably less expensive area!).