That makes much more sense! It sounds like a credentialing issue. Are you in network with UHC? If so, are you credentialed as a facility? We have billed for providers who were credentialed with some groups as a facility, but not with others. We billed the ones that had them as a facility on UB04s and the others on CMS 1500s. You are right, billed on a CMS 1500 will be paid as a professional claim, not a facility claim. But if UHC doesn't have you credentialed as a facility then that is the issue.