CPT® Code 70544

Magnetic resonance angiography (MRA) is a specialized imaging technique that utilizes magnetic fields and radiofrequency pulses to create detailed images of blood vessels in the head. The procedure identified by CPT® Code 70544 specifically refers to MRA performed without the use of contrast materials. This noninvasive approach allows healthcare professionals to evaluate both arterial and venous structures for various vascular conditions. Common indications for this procedure include the assessment of atherosclerotic stenosis, which is the narrowing of arteries due to plaque buildup, as well as arterial dissection, where the layers of an artery wall separate. Other conditions that may be evaluated include acute thrombosis, which is the formation of a blood clot, aneurysms or pseudo-aneurysms, vascular loops, and vascular malformations or tumors. Additionally, MRA can be useful in identifying arterial causes of pulsatile tinnitus, a condition characterized by hearing a rhythmic sound in the ears. The procedure may also be indicated following vascular surgery on intracranial vessels to monitor their status. During the MRA, multiple images are captured, typically 1-2 mm in thickness, and processed using advanced algorithms to generate maximum intensity projections (MIPs), which provide enhanced visualization of the blood vessels. The resulting images are reviewed by a radiologist, who interprets the findings and provides a written report. This comprehensive imaging technique is essential for diagnosing and managing various vascular conditions in the head without the risks associated with contrast materials.