Jim - I agree with what Lottie said, contact the collection agency and document everything! I would also contact that dr's office and ask them for an audit of your account. They need to show you proof that you owe them. They must have that info if they are turning you over to collections and they are the only ones who can call off the collection hounds! Also, as Lottie said, get those credit card statements. Some credit card providors have an annual statement, which might be easier than thumbing through monthly statements.

My husband got all of his sleep apnea equipment through this one company and their billing was horrible. They started sending collection notices and I called them (asked for the billing supervisor) and demanded that they audit the account and it turned out that they owed us a refund!! Of course we never saw it, but at least the collection notices stopped! Needless to say he changed medical supply companies!

Good luck!!
Nanc