Ask Dr. Z

How would you code this scenerio? "INTERVENTION: A 5 French Sophia catheter was advanced into the distal external carotid  artery. Then, a Headway microcatheter was advanced into the middle meningeal artery without difficulty. During this portion of the procedure, continuos Cardene infusion at 25 mg per hour was initiated via the Sophia catheter. Additionally, slow infusion of nitroglycerin was administered through the microcatheter position within the distal middle meningeal artery just proximal to the origin of the frontal branch. Multiple unsuccessful attempts were made to advance a Headway microcatheter into the frontal branch of the middle meningeal artery using a combination of a 5 French Sophia catheter, a Headway Duo microcatheter, and an assortment of microwires including Traxess, Marathon, and Synchro microwires. Due to the acute angle and diminutive caliber of the artery, the procedure was aborted." Our docs want to report codes 36597, 61624, and 75894. However, I don't think 36597 is correct. Also, I'm wondering if modifier -74 should be appended to 61624. Thoughts?