During my first visit to a chiropractor, he went over my treatment plan and told me my insurance covered it all and I would have no out-of-pocket expenses. 9 months and 34 visits later, he told me I was responsible to pay all of the leftover amounts on my EOBs. He said I had a balance that I've not been paying on. He NEVER sent a bill, NEVER explained this to me, DID tell me I would have no out-of-pocket expenses and even reaffirmed this in our most recent conversation ('I know I said to not worry about the leftover amounts, but...'). I saw him for 9 months, 34 visits and my supposed balance is around $500. Should I see a lawyer? I planned on writing a letter to the doctor to see if we could somehow resolve this first.