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Availability last updated 07/06/2025
About Dr. Goyal
Amit Goyal, MD, is a board-certified, fellowship-trained neurological surgeon at Link Neuroscience Institute in Santa Barbara, Camarillo, and Oxnard, California. He specializes in the diagnosis and surgical treatment of nervous system disorders, including those that impact the brain, spinal cord, and peripheral nerves.
An expert in state-of-the-art treatment modalities, Dr. Goyal promotes endoscopic and minimally invasive techniques and robotic-assisted technology for complex brain tumors and spinal deformities.
Dr. Goyal was born and raised in Alexandria, Virginia, and graduated from Georgetown University School of Medicine in Washington, DC. He then completed his neurosurgical training at the University of Minnesota Medical Center in Minneapolis, Minnesota, where he served as Chief Resident.
After the completion of his residency, Dr. Goyal was selected for a highly
competitive and prestigious international fellowship at the Centre for Minimally Invasive
Neurosurgery at the Prince of Wales Hospital in Sydney, Australia. As a fellow, Dr. Goyal became proficient in minimally invasive approaches for removing complex brain tumors and developed unique skills involving minimally invasive techniques and robotic technology to treat the most complicated spinal diseases.
Dr. Goyal later joined Bayhealth Medical Center in Dover, Delaware, where he dramatically grew their neurosurgery program. At Bayhealth, he helped establish a robotic spine program and build and develop the comprehensive, multidisciplinary neuro-oncology (brain tumor) program.
In his free time, Dr. Goyal enjoys traveling with his wife, three young children, and their two Labrador Huskies. He has a passion for the outdoors, particularly hiking and visiting beaches. He is a sports enthusiast, spending much of his time swimming, snowboarding, or playing tennis, golf, and basketball.
Amit Goyal, MD
Neurosurgeon
1700 N. Rose Ave
Suite 470
Oxnard, CA 93030
About Dr. Oni-Orisan
Akinwunmi Oni-Orisan, MD, is a fellowship-trained neurosurgeon, sub-specializing in open cerebrovascular, skull base, and endovascular neurosurgery. At Link Neuroscience Institute in Oxnard and Santa Barbara, California, Dr. Oni-Orisan provides expertise in the treatment of ischemic and hemorrhagic stroke, brain aneurysms, arteriovenous malformations, carotid disease, acoustic neuromas, and skull base tumors. In addition to cerebrovascular disease, Dr. Oni-Orisan has extensive training in the treatment of degenerative and traumatic spine disorders, brain tumors, trigeminal neuralgia, Chiari malformation, carpal tunnel syndrome, pituitary adenomas, and traumatic brain injury.
Dr. Oni-Orisan was born and raised in Ann Arbor, Michigan, to Nigerian immigrant parents. He attended the University of Michigan, where he obtained a Bachelor of Science with Honors in cell and molecular biology. He then went on to obtain a Doctor of Medicine degree at the Wayne State University School of Medicine in Detroit, Michigan. This was followed by a seven-year neurological surgery residency at the Medical College of Wisconsin in Milwaukee, Wisconsin. After the completion of residency, Dr. Oni-Orisan concluded his training with a combined, two-year open cerebrovascular, skull base, and neuro-endovascular surgery fellowship at the University of Texas Health Science Center in Houston, Texas.
Dr. Oni-Orisan lives in the area with his wife and three young daughters. He enjoys sports, music, and traveling.
Dr. Akinwunmi Oni-orisan, MD
Neurosurgeon
1700 N. Rose Ave
Suite 470
Oxnard, CA 93030
Dr. Aaron Filler, MD, PhD
Neurosurgeon
8700 Beverly Blvd
Los Angeles, CA 90048
Board-certified neurosurgeon Brian R. Gantwerker, MD, specializes in the treatment of spinal and neurological conditions. He is fellowship-trained in complex spinal surgery and has been practicing for well over a decade.
At The Craniospinal Center of Los Angeles, patients benefit from his extensive experience treating complex brain and spine problems with minimally invasive techniques, and traditional surgery. Working with new techniques such as neuro navigation, spinal endoscopy, and also providing direct patient care with a physician, Dr. Gantwerker makes the patient paramount.
Well-respected in his field, Dr. Gantwerker has authored several book chapters and peer-reviewed journal articles. He has also appeared on podcasts, television, and radio interviews and has instructed undergraduates, medical students, and residents in various neurosurgical topics.
A Chicago native, Dr. Gantwerker earned a degree with honors in psychology from the University of Illinois at Urbana-Champaign and graduated magna cum laude and Phi Beta Kappa. He went on to receive his medical degree from Rush Medical College in Chicago, where he focused on peripheral nerve regeneration research.
After completing his neurosurgical residency at University Hospitals of Cleveland / Case Western, Dr. Gantwerker studied spinal cord regeneration with stem cells at Case Western School of Medicine. He completed a complex spine fellowship at the world-renowned Barrow Neurological Institute in Phoenix, Arizona.
Dr. Gantwerker is a member of the Phi Beta Kappa and Golden Key honor societies. He is an active member of key esteemed professional organizations, including the American Association of Neurological Surgeons (AANS), the Congress of Neurological Surgeons (CNS), and the North American Spine Society (NASS). He’s also a board member of the California Association of Neurological Surgeons (CANS). Dr. Gantwerker is a board-certified diplomate of the American Board of Neurological Surgeons (ABNS).
Dr. Brian Gantwerker, MD
Neurosurgeon
11600 Wilshire Blvd
Suite 407
Los Angeles, CA 90025
Lance Gravely, MD
Neurosurgeon
15107 Vanowen St
Van Nuys, CA 91405
Lance Gravely, MD
Neurosurgeon
18321 Clark St
Tarzana, CA 91356
Board-certified neurosurgeon Ali H. Mesiwala, MD, FAANS, takes a solution-based approach to determine anatomic and functional abnormalities and then treats them with leading-edge technologies and integrative medicine.
At his four offices in Newport Beach, Marina del Rey, and Rancho Cucamonga, California, he focuses on helping all of their patients return to their normal lives, getting back into motion as quickly as possible.
The team treats a vast array of neurological conditions. After intensive neurological exams and diagnostic testing, they recommend the best nonsurgical treatments for each person's unique health care needs. They recommend surgery when symptoms are severe or persist despite conservative care.
Patients seek Dr. Mesiwala for his expertise in brain and spine surgery, as well as peripheral nerve surgery and artificial disc replacement surgery.
He's an expert in complex brain and skull base surgeries, and he has the most experience in artificial disc replacements on the West Coast, including multi-level operations and all types of spinal decompressions.
Dr. Mesiwala is a leader in the field of minimally invasive sacroiliac (SI) joint surgery and has performed endoscopic cranial and spinal surgery since 2004. No matter where pain originates, patients get relief after he performs neuromodulation surgery.
After earning a Bachelor of Science in biomedical engineering and electrical engineering from Johns Hopkins University in Baltimore, Maryland, Dr. Mesiwala received his Doctor of Medicine from the University of California, San Francisco.
Then he finished his neurological surgery residency at the University of Washington in Seattle, Washington.
He completed his skull base and cerebrovascular fellowships at the University of Washington, International Neuroscience Institute in Hannover, Germany, and the University of Pittsburgh in Pittsburgh, Pennsylvania.
As a respected researcher specializing in the development of novel technologies and minimally invasive techniques for brain and spine surgery, Dr. Mesiwala holds multiple patents for medical devices used in spinal surgery.
In addition to his private practice, Dr. Mesiwala is the faculty surgeon for various artificial disc operations and spinal fusion operations with innovative techniques. He's a fellow of the American Association of Neurological Surgeons (FAANS).
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Dr. Ali Mesiwala, MD
Neurosurgeon
4551 Glencoe Ave.
Suite 145
Marina del Rey, CA 90292
Lance Gravely, MD
Neurosurgeon
1509 Wilson Ter
Glendale, CA 91206
Lance Gravely, MD
Neurosurgeon
1720 E Cesar E Chavez Ave
Los Angeles, CA 90033
Lance Gravely, MD
Neurosurgeon
100 W California Blvd
Pasadena, CA 91105
Dr. Disney is no longer accepting office patients.
Dr. Disney believes that patients need an individualized approach to their neurosurgical problems. This includes complex disorders of the spine and brain as well as peripheral nerves. There is no substitute for listening carefully to patients and guiding them to the best approach to their problem. Many problems of the spine and brain give rise to pain or other impediments to quality of life. Dr. Disney utilizes conservative treatments where appropriate to help resolve these problems and return individuals back to active pain free lives. Many patients don’t need surgery but instead find relief with physical therapy, exercise and activity modification. When needed surgery is performed in the least invasive way possible consistent with alleviating the patient’s symptoms and problems.
A frequent recipient of top doctor awards, patient choice awards and most compassionate doctor awards Dr. Disney takes the time to listen carefully to patients concerns and fears. Treatment options are laid out in layman’s terms to allow patients to understand their choices and what is being recommended to them. Most neurosurgical disorders have more than one possible approach to treatment and it is important to empower patients to make the choice that is correct for them.
A graduate of McMaster University in Hamilton Ontario, Dr. Disney initially studied Engineering Physics and later medicine. The critical thinking and problem solving skills of engineering have been applied to neurosurgery with success. A surgical internship at the University of Toronto was followed by Neurosurgical Residency and Fellowship at the University of Alberta where he also obtained a PhD in Experimental Surgery. Dr. Disney has practiced in the same group practice in Southern California since finishing residency. The practice’s name has changed but what has not is a patient centric approach dedicated to achieving the best possible patient outcomes. All the partners of the group share the same philosophy. When not engaged in neurosurgery Dr. Disney enjoys spending time with his family and is an avid skier, cyclist and aviator.
EDUCATION
ASSOCIATIONS & MEMBERSHIPS
ARTICLES & JOURNALS
Dr. Lew Disney, MD
Neurosurgeon
1015 N 1st Ave
Suite A
Arcadia, CA 91006
Dr. Lederhaus is no longer accepting office patients.
Dr. Scott Lederhaus became interested in neurosurgery at the age of 20 while he attended the University of California Irvine. During his studies, he managed to connect with Dr. Eldon Foltz who was the chief of neurosurgery at UCI Medical Center and became involved in neurosurgery research while observing several neurosurgical procedures and even managed to perform some experimental surgery on animals himself. From that point on, Scott was hooked on neurosurgery.
Scott finished Med school at Rush Presbyterian Hospital in Chicago followed by a year of general surgical internship at UC Davis. After his general surgical internship at UC Davis, Scott later returned to the University of California Irvine for a 6 year residency. Shortly after his residency Scott joined a practice in Pomona with Dr. Colin McDonald and Dr. David Brown for several years. Just prior to Dr. McDonald retiring he told Scott, “I may not have always had the results of the surgery I performed, but I never did a case that I didn’t feel needed to be done.” Scott felt the same and after hearing those words from Dr. McDonald he chose to live by those words.
Dr. Scott Lederhaus enjoys treating patients in the manner he would want a doctor to treat him. He joined the Association of Medical Ethics formed by Dr. Charles Rosen at UC Irvine Medical Center and later became a Board member for the organization. The Association of Medical Ethics is dedicated to evidenced based medicine and doing what is right for the patient independent of financial gain. He is fortunate to have partners at INI who share the same philosophy. He loves his wife and family.
EDUCATION
ASSOCIATIONS & MEMBERSHIPS
ARTICLES & JOURNALS
Dr. Scott Lederhaus, MD
Neurosurgeon
1015 N 1st Ave
Suite A
Arcadia, CA 91006
Dr. Donald Ye has studied the inner workings of the brain and the nervous system his entire career, seeking better ways to fix problems that afflict the brain and spine. As a student, researcher, and clinician, he has had challenged himself to better understand complex neurological pathways and to provide the best solutions for patients and their families with thoughtful clinical judgment and realistic expectations.
Dr. Ye graduated from the University of California, Berkeley as a double major with Highest Honors in Psychology and High Distinction in Molecular and Cell Biology focusing his research on functional imaging of cognitive pathways. He continued his medical education at the Cleveland Clinic Lerner College of Medicine at Case Western Reserve University where he fostered his interest in neurosurgery and neurosurgical oncology. During this time, as a Howard Hughes Medical Institute Medical Research Scholars Program, he spent time studying rare tumor syndromes and molecular pathways involved in glioblastoma in the Surgical Neurology Branch at the National Institutes of Health in Bethesda, MD.
He completed his neurosurgical residency training at Thomas Jefferson University Hospital in Philadelphia, PA. Under the leadership of neurosurgical pioneer – Dr. Robert Rosenwasser – he learned the importance of being a well-rounded surgeon capable of treating diseases with all of the tools and techniques available and tailoring them to best suit each individual patient. Trained in the breadth of traditional and minimally invasive approaches to the brain and spine, Dr. Ye understands the value of minimizing risk and maximizing recovery to provide the best overall outcome for his patients.
Dr. Ye joins Inland Neurosurgery Institute to provide the same high-quality, patient-centric neurosurgical care that his colleagues have provided to the community for decades.
In his free time, Dr. Ye enjoys spending time with his wife and daughter, reading, cooking, and traveling.
EDUCATION
ASSOCIATIONS & MEMBERSHIPS
ARTICLES & JOURNALS
Dr. Donald Ye, MD
Neurosurgeon
1015 N 1st Ave
Suite A
Arcadia, CA 91006
Dr. Srinath Samudrala is a highly experienced neurosurgeon bringing his more than 30 years of experience to INI. He received his medical degree from the University of California Los Angeles (UCLA) and completed his residency at New York University (NYU). He is fellowship trained in spine surgery through University of Florida.
With a commitment to enhancing surgical outcomes and improving the quality of life for his patients, Dr. Samudrala combines compassion and innovation in his treatments. He stays at the forefront of advancements in the field to ensure the best possible care for his patients. He is loved by his patients and colleagues alike.
On his time off, he enjoys spending time with his grown children, skiing, and hiking.
Dr. Srinath Samudrala, MD
Neurosurgeon
1015 N 1st Ave
Suite A
Arcadia, CA 91006
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