Zero stars. A provider that I used uses this service and the billing is a mess. They claimed they did not receive reimbursement from my insurance company but had. They overcharged me and will not refund. I'm going through my credit card company to get a refund now for services not rendered but this is enough to convince me never to use this medical provider again. The people in the billing office are all in India, and they don't seem capable of basic math.