Ask Dr. Z

We had a patient with MR angiogram, evidence of distal left SFA calcific occlusion. Initial antegrade attempt from right common femoral access was not successful in traversing the lesion. Then, patient was placed prone and again traversal attempted from left popliteal retrograde access. It was again unsuccessful in reentry into true lumen (failed subintimal dissection technique). What would be the appropriate CPT codes for this patient? Is it possible to code failed percutaneous revascularization attempt when you have prior CT or MR angiogram?