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Your Care Team

Jon-Paul Pepper, MD

Jon-Paul Pepper, MD

Dr. Pepper is a double-board certified surgeon who specializes in aesthetic and reconstructive surgery of the face, in particular surgery for the treatment of facial paralysis. He is the Director of the Stanford Facial Nerve Center.  His areas of expertise include facial reanimation surgery, facelift surgery, rhinoplasty, and the reconstruction of the face after skin cancer resection.  Dr. Pepper performed his undergraduate studies at Brown University, majoring in Neuroscience.  He completed a one-year research fellowship at the National Institutes of Health in preparation for a career in academic medicine.  He was awarded his M.D. at the University of California, Irvine, graduating with highest honors and Alpha Omega Alpha designation in 2007.  He went to the University of Michigan for residency training in Otolaryngology – Head & Neck Surgery in 2012.  He then completed fellowship training in Facial Plastic & Reconstructive Surgery in 2013, also at the University of Michigan.   

Dr. Pepper and was honored to receive the highest board score in the nation on the American Board of Facial Plastic & Reconstructive Surgery examination in 2013. For this accomplishment, he was given the Jack R. Anderson Award for Scholastic Achievement.   

While on faculty at the University of Southern California from 2013-2017, Dr. Pepper established the USC Facial Nerve Center, and also established a basic science lab that explored new treatments for facial paralysis.  His research was recognized by the American Academy of Facial Plastic & Reconstructive Surgery, for which he was given the Research Scholar Award in 2014.  This award, with other grant support, has permitted the growth of a basic science research program under his direction which is dedicated to facial nerve regeneration.

In 2017, he joined the faculty at Stanford School of Medicine, and was specifically recruited to launch the Stanford Facial Nerve Center.


Sarah Stranberg, MA, CCC-SLP

Sarah Stranberg, MA, CCC-SLP

Sarah Stranberg is a speech-language pathologist with extensive experience in the evaluation and management of communication and swallowing deficits related to neurologic impairments. Her clinical work has included focused rehabilitation of facial paralysis in the context of numerous medical diagnoses. She has degrees in Speech Pathology from Northwestern University and the University of Minnesota. For over 20 years, Sarah has practiced with rehabilitation, otolaryngology and neurology departments at several large academic medical centers. She currently is a senior speech-language pathologist in the Outpatient Neurologic Rehabilitation Program at Stanford Health Care.


Contact Information and Referrals:

Phone:  650-725-5106

Fax:  650-320-9443


Sarah Stranberg, MA, CCC-SLP
Senior Speech-Language Pathologist
Stanford Neuroscience Health Center
213 Quarry Road


Peter Santa Maria, MD, PhD

Peter Santa Maria, MD, PhD

Dr. Peter Santa Maria is a surgeon scientist born and raised in Perth, Australia with a subspecialty interest in Otology, Neurotology and Skull Base Surgery. He attended medical school at The University of Western Australia before undertaking his residency in Otolaryngology, Head and Neck Surgery. He was the Neurotology and Skull Base Surgery fellow at Sir Charles Gairdner Hospital (2012), Western Australia, before undertaking a three year instructorship at Stanford University in Otology, Neurotology and Skull Base Surgery (2015).

Clinically, Dr Santa Maria specializes in adult and pediatric surgery for hearing, balance and facial nerve disorders. He has a special interest in the management of facial nerve tumors of the skull base, head and neck cancer involving the facial nerve and outcomes of stereotactic radiation of acoustic neuroma.

Sam P. Most, MD, FACS

Sam P. Most, MD, FACS

Dr. Most graduated from Stanford University School of Medicine with Dean’s Honors in 1995. He subsequently trained in Otolaryngology-Head & Neck Surgery as well as Facial Plastic Surgery at the University of Washington in Seattle, where he established the first Facial Nerve Center in the Pacific Northwest. He has practiced at Stanford University since 2006. Since that time he has continued to provide specialized treatment of patients with facial paralysis. He has published several papers on facial nerve regeneration and has lectured internationally on this topic. Currently his practice continues to encompass the entirety of facial plastic surgery, with a focus on aesthetic surgery and cutaneous facial reconstruction.

Tonita Wroolie, PhD, ABPP

Tonita Wroolie, PhD, ABPP is a Clinical Associate Professor in the Department of Psychiatry & Behavioral Medicine. As a clinical psychologist she specializes in issues related to adult development and aging as well as assessment of cognitive impairment. She is a fellow in the American Psychological Association, Adult Development and Aging Division and has lifetime board certification as a Geropsychologist through the American Board of Professional Psychology.


Andrea Kossler, MD

Andrea Kossler, MD

Dr. Kossler is the Director of the Ophthalmic Plastic, Reconstructive Surgery and Orbital Oncology Service and the Director of the Oculofacial Aesthetic Surgery  Service at the Byers Eye Institute at Stanford.

Dr. Kossler treats a broad spectrum of oculoplastic disorders, including facial nerve palsy, eyelid cancers, trauma, tearing disorders, eyelid malpositions, orbital tumors, infection and inflammation of the lids, tear duct, and orbit. In addition, she specializes in aesthetic surgery of the eyelids and face. She strives to preserve vision, restore ocular and eyelid function, and improve cosmesis for all patients.

The author of more than 30 publications and book chapters, Dr. Kossler speaks nationally and internationally on oculoplastic surgery. Her research—focused on preserving vision through oculoplastic treatments—encompasses new treatment options for thyroid eye disease, ocular surface disease, cranial nerve palsy, cosmetic eyelid surgery and orbital and eyelid cancer.

Dr. Kossler is Board Certified in Ophthalmology and a fellowship director of the American Society of Ophthalmic Plastic and Reconstructive Surgery (ASOPRS).

Dr. Kossler earned her medical degree from Georgetown University School of Medicine where she graduated summa cum laude and valedictorian of her class. She holds a Bachelor of Science degree from the University of Florida where she graduated with highest honors. She completed her residency in Ophthalmology at the number one ranked Bascom Palmer Eye Institute at the University of Miami Miller School of Medicine. She completed additional training in plastic and reconstructive surgery at the University of Miami with a fellowship in oculofacial plastic and reconstructive surgery.

Jaime López, MD

Director, Intraoperative Neurophysiologic Monitoring Program
Associate Professor of Neurology and Neurological Sciences, and Neurosurgery

Dr. López completed his residency in Neurology and Fellowship in Clinical Neurophysiology and Neuromuscular Diseases with special emphasis in electromyography at Stanford University Medical Center. In 1994, Dr. López established the Intraoperative Neurophysiologic Monitoring (IONM) Program at Stanford. The program specializes in assessing intraoperative nervous system function, including facial and all the motor cranial nerves, to assist surgeons in preserving nerve function, prevent intraoperative nerve injury, and improve patient safety and postoperative outcome. In addition, Dr. López has extensive experience in the pre- and postoperative evaluation and assessment of facial and other cranial nerve disorders using nerve conduction studies (NCS), electromyography (EMG), blink reflex electrophysiologic studies, and electroneuronography (ENoG) which is a specific electrical stimulation study of the facial nerve.  Dr. López also has vast experience in the medical and botulinum toxin treatment of facial and oromandibular disorders.  Dr. López continues to research the use of innovative techniques for intraoperative monitoring of different regions of the nervous system as well as their use in the pre- and postoperative care of patients.

Contact Information:

Outpatient studies
Ruth Jackson: 650-498-3888

Intraoperative Neurophysiologic Monitoring
Jackie Varga and Mark Burdelle