
Columbia Gorge Surgery Center
Meet Our Physicians


Dr. Gregory Stanley, MD
Gregory M. Stanley, MD, MBA, FAAOS, is a board-certified orthopedic surgeon at Columbia Gorge Surgery Center in The Dalles, Oregon. He earned his undergraduate degree from Oregon State University in Corvallis, Oregon, and his medical degree at Oregon Health Science University in Portland, Oregon. Dr. Stanley also completed an internship at Oregon Health Science University’s Department of Surgery in Portland, Oregon, and a residency in orthopedic surgery at the University of Missouri Truman Medical Center in Kansas City. He also completed a fellowship in sports medicine and arthroscopic surgery at Perth Orthopedic & Sports Medicine in West Perth, Australia. He’s affiliated with Cascade Orthopedics and Sports Medicine in The Dalles and Hood River, Oregon.

Dr. John Willer, DO
Dr. John Willer specializes in Cataract Surgery at Columbia Gorge Surgery Center. He completed his ophthalmology residency at Grandview and Southview Hospitals in Dayton, Ohio, and was Board Certified by The American Osteopathic Board of Ophthalmology in 1998 and the American Board of Surgeons. He also performs YAG laser treatments, and iStent® insertions.
Dr. Willer has always been an active participant in his local community and globally. He has traveled worldwide for multiple medical mission trips to India, Guatemala, Ecuador, and Lebanon where he provided no-cost cataract surgery to hundreds of patients.
He is affiliated with Cascade Eye Center in The Dalles and Hood River, Oregon.

Dr. Tanner Shaffer, DPM
Dr. Tanner Shaffer, DPM, AACFAS is a residency trained foot and ankle surgeon. He completed his undergraduate education at American University in Washington DC and podiatric medical school at The Scholl College of Podiatric Medicine in North Chicago, Illinois. He has recently completed his residency in foot and ankle surgery with Loyola University Health System and Mercy Hospital and Medical Center in Chicago, Illinois with credentialing in rearfoot reconstructive surgery. He is affiliated with Cascade Orthopedics & Sports Medicine Center in The Dalles and Hood River, Oregon.

Dr. Francisco Castillo, MD
Dr. Castillo, MD is a fellowship trained cculoplactics surgeon at Columbia Gorge Surgery Center. He completed his ophthalmology residency at the Mayo Clinic College of Medicine, Rochester, MN, and his fellowship at the Wayne State University School of Medicine in Detroit, MI. He is affiliated with Eye Heath Northwest in Portland, Oregon.