I recommend Gary Freeman as a virtual biller, although he is just getting started in his business. He has 7 years experience working for an insurance company as a claims rep so understand all the ins and outs of billing insurance. He also would make a great advocate for you to other reps as he understands how they work in detail. His email is email@example.com or phone # (207) 768-0792.
If you want to visit with me more about why I think he would make a great biller, please feel free to email me at firstname.lastname@example.org