Dr. Aaron J Gustin, DO

Dr. Aaron Gustin is a fellowship-trained cerebrovascular and endovascular neurosurgeon based in Billings, Montana. With a comprehensive approach to neurological care, Dr. Gustin brings both technical expertise and deep compassion to every case—from the most routine to the most complex—recognizing that each one has the potential to significantly impact a patient’s quality of life.

Dr. Gustin’s philosophy of care is rooted in empathy, active listening, and a deep commitment to treating every patient as he would a member of his own family. He believes that excellent outcomes are driven not only by surgical skill but by clear communication, patient education, and trust. In the face of often urgent or life-altering neurological conditions, he strives to create a sense of calm, clarity, and confidence for patients and their loved ones.

His clinical interests span a wide range of complex neurosurgical conditions, including:


Cerebrovascular and endovascular neurosurgery
… Brain and spinal aneurysms
Arteriovenous malformations (AVMs)
Dural arteriovenous fistulas & carotid-cavernous fistulas
Cavernous malformations
Microvascular decompression for trigeminal and glossopharyngeal neuralgia, and hemifacial spasm
Cerebral bypass surgery for Moyamoya disease
Carotid endarterectomy and carotid stenting
Stroke thrombectomy
Middle meningeal artery embolization for chronic subdural hematoma
Venous sinus stenosis and stenting
Tumor embolization & embolization for epistaxis
Cerebral and spinal tumors
Traumatic and degenerative spinal disorders
Carpal and cubital tunnel syndromes


Outside the operating room, Dr. Gustin is a devoted husband and father who enjoys spending time with his wife and their five children. He’s also an avid sports fan and enjoys both watching and playing whenever time allows.