Question: Can you suggest a code for an extracranial angioplasty of internal carotid artery? No stent was placed and this procedure was done for a patient covered by Medicare. Is it correct to report code 37799? Please share your opinion for using GZ modifier since it is a non-covered procedure.
Ohio Subscriber
Answer: Medicare does not cover carotid and vertebral artery angioplasty without stent placement. CMS states that the carotid artery is not a peripheral artery so the use of code 75962 (Transluminal balloon angioplasty, peripheral artery other than renal, or other visceral artery, iliac or lower extremity, radiological supervision and interpretation) is not appropriate. You may discuss with your payer and consider reporting code 37799 (Unlisted procedure, vascular surgery) with modifier GY (Notice of Liability Not Issued, Not Required Under Payer Policy).