Good Morning I'm looking for some help with coding denials for Retrograde Pyelogram-CPT 74420(26) and Cystourethroscopy-52332. As I have reviewed there are no active CCI edits between the two codes, however Aetna and BCBS are continuously denying to reimburse for the retrogrades...Can anyone help explain if their practices run into this issue and or what is the warranted supporting information in billing both? Thank you.