Can someone please help me to understand why my claims are being rejected and how to correct them? We are now considered a pain clinic and are doing UDS for Medicare patients with the CPT code G0434 and a QW modifier Dx code is V58.69. My claims are being seperated and the office visit paid and the UDS denied for reasons such as CO-16, 18 and MA130 and MA15. I can not find what invalid info / lack of information they are referring to and have spoke to Medicare and they refer me to the Provider Manual which I have looked at and still find no answers. We do not use a 25 modifier on the office visit because I was told they did not need it with this code. Any suggestions??