I have just come on board with a practice who has struggled with billing and am working on recovering as much of their aging A/R as possible. After 2 months of working on the AR (there's about .5 mil in total), the provider is frustrated that more hasn't been done. I initially explained that to get the process completed where we could comfortably call the A/R "resolved" would take anywhere between 6-12 months. The provider initially agreed, but now insists that the work could be done in half the time by rebilling claims to insurance companies, even if they've already been billed. He said it's better to rebill the carrier and say we "forgot" we already billed them. I understand this goes against billing best practices, but how do I explain that to him? The payers will ultimately deny claims as duplicates, but doesn't that process also actually make the process take longer, not speed it up? How do you deal with difficult providers who think they know better?