I am getting denials from several insurance companies that I have never got before this week. I bill any procedures after the mastectomy that are associated with a patients breast cancer with codes V45.71 and V10.3. I am getting denials because of the dx, I never got these before. I do know that I can use a cancer code if they are being treated by medication for the cancer. Please let me know if you have any suggestions. I also posted this under the plastic surgery section. Thanks