Can someone please answer this question? We have a voluntary ABN for a service Medicare never covers. When we use the GX/GY Modifier for G0283 and 97012 codes, Medicare says this is an "inconsistent modifier(s)" for the service. I have researched this everywhere I can think of, including ChiroCode which says GX/GY Modifier is correct. I would appreciate any information. I am not a newbie, this is just something that started about 8 months ago with Medicare.