NEUROSURGEONS
Fernando G. Diaz, M.D., Ph.D.
General Neurosurgery
Minimally Invasive Spine Surgery
Richard D. Fessler, M.D.
Endovascular Neurosurgery
Holly S. Gilmer, M.D.
Adult & Pediatric Neurosurgery
Peripheral Nerve Surgery
Mark L. Goldberger, D.O., M.S.
General Neurosurgery
Minimally Invasive Spine Surgery
Jeffrey T. Jacob, M.D.
Craniofacial and Skull Base Surgery
Pituitary tumors and Endoscopic Surgery
Robert R. Johnson II, M.D.
MHSI, President
Adult Neurosurgery
Neurotrauma
Fredrick S. Junn, M.D.
General Neurosurgery
Complex Spine
Kevin R. Lee, M.D.
Minimally Invasive Neurosurgery
Spinal Endoscopy
Ali W. Luqman, M.D.
Minimally Invasive Neurosurgery
Brain, Pituitary and Spine Tumors
Ratnesh N. Mehra, D.O., FACOS
MHSI, Vice President
Minimally Invasive Neurosurgery
Robotic, Endoscopic, and Complex Reconstructive Spine Surgery
Tejpaul S. Pannu, M.D.
MHSI, Treasurer
General Neurosurgery
Trigeminal Neuralgia
John J. Steele, M.D., Ph.D.
Endovascular Neurosurgery
Richard S. Veyna, M.D.
Complex Spine & Cranial Neurosurgery
Daniel R. Pieper, M.D.
In Memoriam
Daniel B. Michael, M.D., Ph.D.
Emeritus
Harold D. Portnoy, M.D.
Emeritus
PHYSIATRISTS
Karl R. Freydl, D.O.
Interventional Physiatry
Sophia E. Grias-Radwanski, M.D.
Physical Medicine & Rehabilitation
Pain Management
John M. Marshall, M.D.
Interventional Pain Management
Henry C. Tong, M.D., M.S.
Interventional Pain Management
NEUROLOGY
David Lustig, D.O.
Neurologist
MEDICAL ACUPUNCTURE
Alison Lee, M.D.
Medical Acupuncture
Integrative Pain Management
ANESTHESIOLOGY & PAIN MANAGEMENT
Stephen D. Hofmeister, D.O.
Anesthesiology & Pain Management
PHYSICIAN ASSISTANTS/NURSE PRACTITIONERS
Elizabeth Francek, NP-C
Certified Nurse Practitioner
Brandon Helchowski MSN, NP-C
Certified Nurse Practitioner
Justin Hugelier, MS, PA-C
Certified Physician Assistant
Olga Klahm, PA-C
Certified Physician Assistant
Nicholas Lorenz, MS, PA-C
Certified Physician Assistant
Jennifer Podgorny, PA-C
Certified Physician Assistant
Christine Schomer, MSN, NP-C
Certified Nurse Practitioner
Jennifer Smith, MSN, AGACNP–BC
Certified Nurse Practitioner
