Yes, for the portion I was responsible for ($750 deductible, then 20% until I hit my out-of-pocket maximum for the year). Apparently they do "global billing" for full-pregnancy care, but since I have called and advised them I'm transferring to another practice, they have to (basically) undo all the billing that has been done, then re-charge me on a per-visit basis. Which "may end up being more or less than what you have paid; if you are due a refund, we will send it to you."
Successfully switched to a much nicer natural-birth practice - I'm seeing a CNM! And did the hospital tour yesterday. Very happy with this change. =)