First off, chemo twice a week for 9 months seems like a lot of poison but I'm not a oncologist though I've twice been treated by one. But, the co-pay need is based on your insurance plan. You need to consult with them to find this out. If you are to pay a portion of the tab, you either do it through co-pay or will receive an EOB (explanation of benefits) form from your insurance telling you what they paid and what you owe. The physician's billing service bills you for the remainder. Have you received any EOB forms and bills from the doctor? If not, it's probable that you're on a co-pay system. It's also possible that the receptionist was mistaken. However, such a mistake does not relieve you of a co-pay obligation. It's quite possible that's what happened and you owe that amount. Check with your insurance carrier...the sooner the better.
I started seeing a local oncologist twice each week for chemo. After each visit I stopped by the receptionist desk to make a co-pay and was waved to the door saying "it's all good see you soon". After three months of having no co-pay accepted I stopped making the offering at each visit. NINE MONTHS after first visit I received a bill from the Doc's office saying I owed $800 for co-pays starting with my first visit. Am I liable for this payment?
My take is that the office made it clear to me they did not require co-pays and therefore I owe nada. If they had requested co-pay at each visit I believe and I gave them an excuse not to pay that day I would be responsible for the bill. What say you all? I also believe if you owe, a bill should be sent monthly or at least in a reasonable time.