![PNI building exterior](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/PNI_Building_2125_Arizona_SS_6405-1-1400x600.jpg)
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.
![Dr. Jason Tarpley](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Jason-Tarpley-vid-1200x675.jpg)
![Dr. Sam Hou](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sam-Hou-vid-1200x675.jpg)
![Christopher Putman, MD](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/putman.png)
![](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Iyer-1092x675.png)
![Sandra Narayanan MD thumbnail](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sandra-Narayanan-MD-thumbnail.png)
![Walavan Sivakumar, MD](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sivakumar_video-1200x675.png)
![Dr. Jason Tarpley](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Jason-Tarpley-vid-768x432.jpg)
Meet Dr. Jason Tarpley
![Dr. Sam Hou](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sam-Hou-vid-768x432.jpg)
Meet Dr. Samuel Hou
![Christopher Putman, MD](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/putman-434x432.png)
Meet Dr. Christopher Putman
![](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Iyer-768x432.png)
Meet Dr. Adi Iyer
![Sandra Narayanan MD thumbnail](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sandra-Narayanan-MD-thumbnail.png)
Meet Dr. Sandra Narayanan
![Walavan Sivakumar, MD](https://www.pacificneuroscienceinstitute.org/stroke-neurovascular/wp-content/uploads/Sivakumar_video-768x432.png)
Meet Dr. Walavan Sivakumar
Contact Us
The Pacific Stroke and Neurovascular Center’s state-of-the-art facilities are located at:
Providence Saint John’s Health Center
2125 Arizona Ave., Santa Monica, CA 90404
310-829-8319
Providence Little Company of Mary Medical Center Torrance
4201 Torrance Blvd., Suite 520, Torrance, CA 90503
424-212-5340
Providence Saint Joseph Medical Center
501 S. Buena Vista Ave., Burbank, CA 90505
818-847-6049
Providence Holy Cross Medical Center
15031 Rinaldi St, Mission Hills, CA 91345
818-847-6570