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Hi Dr. Z Hope you can help me in my question. A patient is brought in for heart catheterization. Catheter placement and imaging are done in the LIMA to the LAD (patent), saphenous vein graft to OM (this has 80% stenosis), saphenous vein graft to RC (patent), they also engage the RIMA (which isn't used as a bypass graft but is found to be occluded from angiography). They also perform LVEP. they place a stent in the saphenous vein graft to the OM. I know to bill 93459-59-26 along with 92980-LC using dx code 414.02 but my question is in regards to the RIMA. Would it be permissible to bill the catheter placement for the RIMA36217-26 using dx code 440.20? Any help would be appreciated. thanks!