Our Team

Our Team of Brain Tumor Specialists

Expertise, collaboration and innovation are essential in providing the best possible care for patients with brain, skull base and pituitary tumors.

We have a highly experienced team of national and international experts who work closely together from diagnosis to treatment, as well as providing patient education and support.

Brain Tumor Physicians

Daniel F. Kelly, MD

Neurosurgery PNI Director & Founder

Garni Barkhoudarian, MD

Neurosurgery

Walavan Sivakumar, MD

Neurosurgery

Adi Iyer, MD, MS

Neurosurgery, Neuro-interventional Surgery

Nouzhan Sehati, MD

Neurosurgery

Jose Carrillo, MD

Neuro-Oncology

Naveed Wagle, MD

Neuro-Oncology

Howard R. Krauss, MD

Eye Neuro-ophthalmology PNI Founder

Courtney Voelker, MD, PhD (DPhil Oxon)

Ear ENT Surgery

Robert Wollman, MD

Radiation Oncology

April Vassantachart, MD

Radiation Oncology

Chester F. Griffiths, MD

ENT Surgery PNI Founder

Yuki Takasumi, MD

Neuropathology

David Krasne, MD

Pathology

Brain Tumor Advanced Practice Providers

Natasha Cueto, MSN, APN, AGACNP-BC

Neurosurgery

Amy Eisenberg, MSN, ARNP, CNRN

Neurosurgery

Jared Chow, PA-C

Neuro-Oncology

Steven K. Dillavou, PA-C

Neurosurgery

Lidia Lee, PA-C

Emmaline Mauritson MPAP, PA-C

Neuro-Oncology

Victoria Tedrow, PA-C

Neurosurgery

Judy Truong, PA-C

Neuro-Oncology

Janet Yong, NP-C

Neuro-Oncology

Brain Tumor Allied Health / Support Team

Robin Banuelos

Jenna Banaag, MHA

Janet Bell

Elizabeth Beltran

Selenia Claros

Natali Escalante

Christine Grothe

Francisco Larios Cortez

Nancy Linares

Marilou Loreto

Erika Lozano

Amanda MacDougall , RN

R.J. Mallari

Scientific Writer – Neurosurgery

Efren Pakingan, BSHS

Matthew Pelletier

Maricela Sandoval

Meet Our Team

Our Brain Tumor Center Meet Dr. Daniel F. Kelly Meet Dr. Garni Barkhoudarian Dr. Barkhoudarian is the Co-Director Pituitary Disorders Center, Neurosurgery; Director, Adult Hydrocephalus Center; Director, Facial Pain Center; Chief, Radiosurgery Program; Director, JWCI / PNI Microdissection Anatomy Laboratory. He is a… Meet Dr. Griffiths Dr. Griffiths, MD, FACS, is board certified in Otolaryngology, Head and Neck Surgery and Facial Plastic and Reconstructive Surgery. He has an extensive 25 year experience in endoscopic endonasal sinus… Meet Dr. Walavan Sivakumar Dr. Walavan Sivakumar is a fellowship-trained neurosurgeon with a focus on skull base and minimally invasive and endoscopic neursosurgery. Selected as a multiple year recipient of the SuperDoctor Rising Stars… Meet Dr. Adi Iyer Nuestro Brain Tumor Center Meet Dr. Nouzhan Sehati Dr. Sehati, is a board-certified neurosurgeon who specializes the treatment of a wide variety of brain, spine and spinal cord disorders at Pacific Neuroscience Institute. His expertise is in surgical… Meet Dr. Courtney Voelker COURTNEY C.J. VOELKER, MD, PhD Director, Otology/Neurotology-Lateral Skull Base Surgery; Director, Adult & Pediatric Cochlear Implant Program Dr. Voelker is an otolaryngology – head & neck surgeon who takes care…

Our Brain Tumor Center

Meet Dr. Daniel F. Kelly

Meet Dr. Barkhoudarian

Meet Dr. Griffiths

Meet Dr. Walavan Sivakumar

Meet Dr. Adi Iyer

Nuestro Brain Tumor Center

Meet Dr. Nouzhan Sehati

Meet Dr. Courtney Voelker