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 Borissov Kostov, MD

Dean Borissov Kostov, MD

Neurosurgery, Spine Surgery, Neurointerventional Specialist,

Riverside Neurovascular Specialists

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


Wolfgang Leesch, MD

Wolfgang Leesch, MD

Neurology, Neurointerventional Specialist,

Riverside Neurovascular Specialists

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


Renato Andre Castro de Oliveira, MD

Renato Andre Castro de Oliveira, MD

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.


Lisa Berta Herrmann, FNP

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.


Heather Rogers Singleton, AGACNP

Heather Rogers Singleton, AGACNP

Neurointerventional Specialist,

Riverside Neurovascular Specialists

Specializes in treating stroke and vascular disease in adults.