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Our providers

Our Physicians

John F. Keller, M.D.

John F. Keller, M.D.

Neurosurgeon

Areas: General, Robotic Spine, Complex Spine, Artificial Disc Replacement, Cervical Arthroplasty, Spine Tumors and Coflex® Interlaminar Stabilization, Motion Preservation, Minimally Invasive Surgery (MIS)

Bryan E. Figueroa, M.D.

Bryan E. Figueroa, M.D.

Neurosurgeon

Areas: Brain and Skull-Base, Cerebrovascular, Brain Aneurysm and Vascular Malformations, Carotid Artery Disease, Brain Tumors, Skull-Base Tumors, Endoscopic and Transcranial Surgeries

Justin C. Clark, M.D.

Justin C. Clark, M.D.

Neurosurgeon

Areas: General, Brain and Skull-Base, Vascular Lesions of the Brain and Spine, Carotid Artery Disease, Minimally Invasive Spine (MIS), Complex Spine, Thoracic Spine, Brain and Spine Tumors

Todd D. Vogel, M.D.

Todd D. Vogel, M.D.

Neurosurgeon

Areas: General, Minimally Invasive Spine (MIS), Cervical Arthroplasty, Deformity Spinal Intervention, Osteoporosis, Spinal Oncology, Traumatic Spinal Cord Injuries and Complex Spine

Kevin Chen, M.D.

Kevin Chen, M.D.

Neurosurgeon

Areas: General, Surgical Treatment of Movement Disorders, Epilepsy Surgery, Chronic Pain, Neuromodulation for Spine Disorders, Intra-operative Imaging, Frameless Stereotactic Techniques, Robotics for Neurosurgery, Trigeminal/Glossopharyngeal Neuralgia and Hemifacial Spasm

Our Mid-level Providers

Marcia Fitzgerald, PA-C

Marcia Fitzgerald, PA-C

Marcia has been working for Dr John Keller since 2001. She had 3 years of experience in Orthopedic Surgery prior to joining GLNA. She graduated with her Bachelor’s in Health Science as well as her Master’s in Physician Assistant Studies from Grand Valley State University in Grand Rapids, MI.  

Paige Barber, PA-C

Paige Barber, PA-C 

Paige has been working for Dr John Keller since 2019. She had 5 years of Neurosurgical experience prior to joining GLNA. She graduated with her Bachelor’s in Biomedical Science as well as her Master’s in Physician Assistant Studies from Grand Valley State University in Grand Rapids, MI.

Brent Benso, PA-C

Brent Benso, PA-C

Brent has been working for Dr Bryan Figueroa since 2015. He had 3 years of experience in Pain Management and Neurosurgery prior to joining GLNA. He graduated with his Bachelor’s in Biology from the University of Detroit Mercy and his Master’s in Physician Assistant Studies from Mercy College in Bronx, NY. 

Cutler Ludington, PA-C

Cutler Ludington, PA-C

Cutler has been working for Dr Justin Clark since 2020. He had 2 years of experience in Neurosurgery prior to joining GLNA. He graduated with his Bachelor’s in Health Science from Grand Valley State University and his Master’s in Physician Assistant Studies from Lincoln Memorial University in Harrogate, TN.

Bradley Wernette, PA-C

Bradley Wernette, PA-C

Bradley has been working for Dr Todd Vogel since 2017. He had 5 years of experience in Trauma Surgery prior to joining GLNA. He graduated with his Bachelor’s in Health Professions from Grand Valley State University and his Master’s in Physician Assistant Studies from Lincoln Memorial University in Harrogate, TN. 

Patrick O’Connor, PA-C

Patrick O’Connor, PA-C

Patrick joined GLNA in 2018 and has been working with Dr Kevin Chen since 2019. He had 15 years of experience in Orthopedic Spine Surgery and Orthopedic Urgent Care prior to joining GLNA. He graduated with his Bachelor’s in Education from Bemidji State University and his Master’s in Physician Assistant Studies from Western Michigan University in Kalamazoo, MI.