Our Team

Meet Our Stroke & Neurovascular Specialists

Four center directors cover the extensive footprint of PNI Neurovascular Services across Southern California: Drs. Jason Tarpley, Samuel Hou, Walavan Sivakumar, and Aditya Iyer. 

Stroke and neurovascular conditions are treated by neurosurgeons and specialist surgeons called neurointerventional radiologists (also called interventional neuroradiologists or neurointerventional surgeons).

Our specialists offer experience and personalized treatment to all our patients. Our multidisciplinary experts are leaders in their field and contribute to the advancement of knowledge and understanding of neurovascular disease.

Expert Team

(In alphabetical order by specialty)

Samuel Hou, MD, PhD

Neurointerventional Surgery

Adi Iyer, MD, MS

Neurosurgery, Neuro-interventional Surgery

José M. Morales, MD, MSc

Vascular Neurology, Neurointerventional Surgery

Ashkan Mowla, MD

Neurointerventional Surgery

Sandra Narayanan, MD

Vascular Neurology, Neurointerventional Surgery

Christopher Putman, MD

Neurointerventional Surgery

Jason Tarpley, MD, PhD

Neurointerventional Surgery

Walavan Sivakumar, MD

Neurosurgery

Jennifer Kisiler, NP-C

Neurointerventional Surgery

Jennifer Kulesza, PA-C

Neurointerventional Surgery

Kamila Szweda, RN, MSN, FNP

Neurointerventional Surgery

Heather Trattner, PA

Neurointerventional Surgery

Annika Canta, MS, CCC-SLP

Speech-Language Pathology

Katrin Gabriel, MS, CCC-SLP

Speech-Language Pathology

Romina Huerta, MS, CCC-SLP

Speech-Language Pathology

Medha Sataluri, MS, CCC-SLP

Speech-Language Pathology

Dana Rivera

Provider Videos

Meet Dr. Samuel Hou

Meet Dr. Adi Iyer

Meet Dr. José Morales

Meet Dr. Sandra Narayanan

Meet Dr. Christopher Putman

Meet Dr. Walavan Sivakumar

Meet Dr. Jason Tarpley

Pacific Stroke & Neurovascular Center

Contact Us

The Pacific Stroke and Neurovascular Center’s state-of-the-art facilities are located at: