Hi Trisha,
We experienced the same thing when we started. Nobody likes to talk to other billing services. That's one of the reasons we started writing the books and then the websites. There's enough business out there!
Anyway, the example I used in the book happens to be a local carrier that most state workers in NY have. They have a deadline of March 31st for all claims in the previous year. It is unusual. Most have 30, 60, 90 or 120 day deadlines. But anything you can use to get the dr to let you do some work to save him from losing money is a great way in the door.
Good luck and we always love to hear when the books are helpful.
Michele