Neurosurgery

The Riverside Neurovascular team is dedicated to treating patients with vascular disorders affecting the brain and spinal cord, including stroke. Our team approach ensures comprehensive, coordinated care for patients from hospitalization through outpatient treatment and services. Our board-certified specialists are fellowship trained in neurointervention and are at the forefront of neurovascular care.

Dean B. Kostov, M.D.

Neurosurgery/Neurointervention

Riverside Neurovascular Specialists

Specializes in neurointerventional radiology, endovascular neurosurgery, cranial and spine surgery.

Meet Dr. Kostov


Wolfgang Leesch, M.D.

Stroke Neurology/Neurointervention

Riverside Neurovascular Specialists

Specializes in interventional neuroradiology, endovascular neurosurgery, neurointerventional surgery and vascular neurology.

Meet Dr. Leesch


Renato Oliveira, M.D.

Neurointerventional Specialist

Riverside Neurovascular Specialists

Specializes in neuroendovascular procedures to treat patients experiencing conditions such as cerebral aneurysms, ischemic and hemorrhagic strokes and cerebral vascular malformations.

Meet Dr. Renato


Lisa Berta Herrmann, FNP

Neurointerventional Specialist

Riverside Neurovascular Specialists

Specializes in caring for patients with neurovascular conditions, including brain aneurysms, arteriovenous malformations (AVMs), carotid stenosis and strokes.

Meet Lisa


Heather Rogers Singleton, AGACNP

Neurovascular Specialist

Riverside Neurovascular Specialists

Specializes in treating stroke and vascular disease in adults.

Meet Heather