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Our Team

Meet Our Experienced, Highly Qualified Team

Our Spine Center is run by an expert team of highly skilled and thoroughly trained neurosurgeons and spine specialists using state-of-the-art surgical interventions and equipment. Each of our surgeons has completed years of rigorous medical education and surgical training.

Because our approach is to find the right specialist with the right surgical or non-surgical intervention for your needs, we will take the time and care needed to carefully evaluate your condition and provide you with the best treatment options.

Take a moment to meet our team of highly qualified practitioners:

Alan T. Hunstock, M.D.
Neurosurgeon

Alan T. Hunstock, M.D., is a Neurosurgeon at Santa Rosa Memorial Hospital. Dr. Hunstock received his medical degree from the University of Oregon Medical School and completed an internship and residency at the University of California, Los Angeles. He completed a fellowship in neurology and neurosurgery at the University of London. This was followed by five years in neurosurgery training at UCLA.

Board certified in neurosurgery by the American Board of Neurological Surgery, Dr. Hunstock’s professional affiliations include the Sonoma County Medical Association, the California Association of Neurological Surgeons, Western Neurological Society, the American Association of Neurological Surgeons, the Congress of Neurological Surgeons, the Spine and Trauma sections of the American Association of Neurological Surgeons, and the San Francisco Neurological Society.

Paul A. LaHaye, M.D.
Neurosurgeon

Paul A. LaHaye, M.D., is a neurosurgeon at Santa Rosa Memorial Hospital. Dr. LaHaye received his medical training from Tulane University, School of Medicine in New Orleans. He completed an internship at Parkland Memorial Hospital in Dallas, followed by five years of neurosurgical training at UCLA.

Board certified in neurosurgery by the American Board of Neurological Surgery, Dr. LaHaye’s professional affiliations include the Sonoma County Medical Association, the California Medical Association, the American Medical Association, the California Association of Neurological Surgeons, the Congress of Neurological Surgeons, and the American Association of Neurological Surgeons.

Eldan B. Eichbaum
Neurosurgeon

Eldan B. Eichbaum, M.D., is a neurosurgeon at Santa Rosa Memorial Hospital. Dr. Eichbaum completed his medical degree at the University of California, San Francisco, where he also completed an internship and five years of neurosurgical training. He finished a fellowship in complex and reconstructive spinal neurosurgery at the University of New Mexico in Albuquerque.

Dr. Eichbaum’s professional affiliations include the Sonoma County Medical Association, the American Association of Neurological Surgeons, the California Association of Neurological Surgeons, the Congress of Neurological Surgeons, and the American Medical Association.

Samir Lapsiwala, M.D.
Neurosurgeon

Samir Lapsiwala, M.D., is a neurosurgeon at Santa Rosa Memorial Hospital. Dr. Lapsiwala received his medical degree from the Pennsylvania State University, School of Medicine. After completing a general surgery internship and neurosurgery residency at the University of Wisconsin Hospital and Clinics, he completed a spine fellowship at The Cleveland Clinic Foundation.

Dr. Lapsiwala has received many awards including a Congress of Neurological Surgery/DePuy AcroMed Clinical Fellowship in Spinal Neurosurgery. The $50,000 fellowship award is given for research in spinal neurosurgery. Dr. Lapsiwala’s research has focused in biomechanics of the spine and neuro-oncology.

He has presented and published widely in the areas of spinal biomechanics, spine surgery, and neurosurgery.

John M. Grollmus, M.D.
Neurosurgeon

John M. Grollmus, M.D., is a neurosurgeon at Santa Rosa Memorial Hospital. He received his medical training from Washington University Medical School in St. Louis, Missouri and completed a surgical internship at Vanderbilt University Hospital. After serving as a flight surgeon at the U.S. Navy, School of Aviation Medicine in Pensacola, Florida, he finished a five-year residency in the Department of Neurosurgery at the University of California, School of Medicine in San Francisco.

Board certified by the American Board of Neurological Surgery, Dr. Grollmus has specialized training in degenerative lumbar spine synthes, minimally invasive lumbar fusion, cervical spine synthes, vertebroplasty, and acute neurospinal disorders.

Dr. Grollmus has published extensively on spinal and neurological issues. His professional affiliations include the American Association of Neurological Surgery, the Congress of Neurological Surgeons, the American College of Surgeons, and the Society of Neurological Sciences.

Spinal Care is provided at Santa Rosa Memorial Hospital.
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