My doctor did a pta and stent of celiac artery which I billed 35471, 7596626 and 37205 and 7596026. Medicare pd for the 35471 and 75966, but denied 37205 and 75960 for the dx which I used on all 447.4. Any suggestions on dx that will be covered for the stent placement in the celiac artery along with the 447.4. Thank you for your help!!