Our Doctors

Mercy Knees and Hips

Board Certified Orthopedic Surgeon.  Residency at University of Oklahoma College of Medicine.

Robert F. Mahnken, MD

Board Certified Orthopedic Surgeon.  Residency at University of Oklahoma College of Medicine.

Michael Nachtigal, MD

Board Certified Orthopedic Surgeon.  Residency at University of Texas, Galveston.

Richard Seagrave, MD

Board Certified Orthopedic Surgeon.  Residency at University of Arkansas for Medical Sciences.

Bradley Walz, MD

Mercy Spine Surgeons

Spine surgery is a multidisciplinary area bringing together orthopedic surgeons and/or neurosurgeons who specialize in spine care.

Residency at University of California – San Diego Medical Center – Neurosurgery.

Chiazo S. Amene, MD

Board certified in Neurological Surgery. Fellowship in Interventional Endovascular Neuroradiology at West Virginia.  Residency in Neurosurgery at West Virginia University.

Brenton Coger, MD

Residency at Vanderbilt University Medical Center – Neurological Surgery.

Moneeb Ehtesham, MD

Board certified in Neurosurgery. Fellowship in Pediatric Neurosurgery at University of Toronto, Canada. Residency in Neurosurgery at the University of Vermont.

Sami Khoshyomn, MD

Residency at North Shore University Hospital – Neurological Surgery.

Tina Carita Loven, DO

Board certified in Orthopedic Surgery. Fellowship in Spine Surgery at University of Texas Health Science Center, San Antonio.

Fred McQueary, MD

Board certified in Neurosurgery. Residency in Neurosurgery at the University of Pittsburgh, UPMC Presbyterian Hospital.

Alan Scarrow, MD

Board certified in Orthopedic Surgery. Residency at Tulane University School of Medicine.

Paul Olive, MD

Board certified in Neurosurgery. Residency in Neurosurgery at Yale University School of Medicine.

Sunghoon Lee, MD

Health Psychology

Health Psychologists treat pain caused by medical problems using behavior tools to create positive changes.

Board Certified in Clinical Health Psychology. PsyD, Forest Institute specialization in neuropsychology. MS Pharmacology, Alliant University. Internship, Bradley Center, Columbus, Georgia.

John Kreymer, PsyD

Licensed Psychologist. PsyD, Forest Institute, Clinical Psychology with specialization in applied neuropsychology; Industrial Health Research Assistantship, University of Denver.

Patrick Weis, PsyD

Mercy Pain Management

Pain Management are physicians who evaluate, diagnose, and provide interventional treatment for a variety of pain syndromes.

Residency in Anesthesiology at Brigham and Women’s Hospital.

Jeremy Phillippe Broadnax, MD

Board Certified in Anesthesiology Pain Management. Residency in Anesthesiology at University of Missouri Kansas City.

Sadie Ochs Giedd, DO

Board Certified in Anesthesiology Pain Management. Residency in Anesthesiology at University of Alabama at Birmingham.

Benjamin A. Lampert, MD

Board Certified in Physical Medicine & Rheabilitation (Pain Medicine). Residency in Physical Medicine 7 Rehabilitation at The Ohio State University Wexner Medical Center.

Eric Wayne Stewart, MD

Mercy Physical Medicine and Rehabilitation

Physiatry is a medical specialty concerned with physical rehabilitation due to disease or injury.

Board certified in Physical Medicine & Rehabilitation. Residency in Physical Medicine & Rehabilitation at the University of Rochester School of Medicine.

Ronald Pak, MD

Board certified in Physical Medicine & Rehabilitation. Residency in Physical Medicine and Rehabilitation at Medical College of Wisconsin.

Rana Tenorio, MD