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Availability last updated 12/31/2025
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 Integrated Healthcare in Oxnard, Camarillo, 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
18350 Roscoe Blvd
Ste 706
Northridge, CA 91325
Azadeh Farin, MD, FAANS, FACS, is a fellowship-trained and board-certified neurosurgeon at FARINeurosurgery, with experience in a wide range of neurosurgical procedures.
Her research has earned her lead authorship for several manuscripts published in prominent medical journals. She completed her internship in General Surgery and residency in Neurosurgery at the University of Southern California (USC). She was the first woman in over 25 years to graduate from USC Neurosurgery. She served as Clinical Instructor of Neurosurgery at Keck School of Medicine at USC and LA County-USC Medical Center. Dr. Farin completed a fellowship in complex spine surgery and spinal deformity/tumors at UCSF, receiving the Congress of Neurological Surgeons Spine Research Award, granted to only one fellow in the US.
In 2010, Dr. Farin won the Avicenna Award of Excellence. She has guest reviewed for the journal Neurosurgery and consulted for Grey’s Anatomy. She was recently granted a full patent by the US Patent and Trademark Office for her spinal device invention. Dr. Farin has published several dozen manuscripts, articles, and book chapters.
Azadeh Farin, MD
Neurosurgeon
23861 McBean Pkwy
Suite B18
Santa Clarita, CA 91355
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 Integrated Healthcare in Oxnard, Camarillo, 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
2750 Sycamore Dr
Ste 200
Simi Valley, CA 93065
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 Integrated Healthcare in Oxnard, Camarillo, 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
4000 Calle Tecate
Ste 211
Camarillo, CA 93012
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 Integrated Healthcare in Oxnard, Camarillo, 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
900 Avenida Acaso
Ste 200
Camarillo, CA 93012
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 Integrated Healthcare in Oxnard, Camarillo, 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
1901 Outlet Center Dr
Ste 210
Oxnard, CA 93036
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
About Dr. Goyal
Amit Goyal, MD, is a board-certified, fellowship-trained neurological surgeon at Link Integrated Healthcare 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
18350 Roscoe Blvd
Ste 706
Northridge, CA 91325
About Brittni
Brittni Mack, PA-C, is a neurosurgery and neurointerventional surgery physician assistant who joined Link Integrated Healthcare in 2023. She started her career in trauma and emergency general surgery, where she cultivated a fascination and appreciation for neurosurgical care.
Brittni was born and raised near Pittsburgh, PA, and completed both of her undergraduate and graduate physician assistant studies at Saint Francis University in Loretto, PA. There, she earned minors in neuroscience and biology. Shortly after graduation, she moved to Southern California to chase the sunshine and launch her career. In her free time, she enjoys the beach, adventures with her dogs and cat, plant-based cooking, snowboarding, live music, and Pittsburgh Penguins hockey.
Brittni Mack, PA-C
Physician Assistant
18350 Roscoe Blvd
Ste 706
Northridge, CA 91325
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
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